Plant database
What we grow and what it drinks
Watering thresholds as percentages. Every monitor is calibrated before it ships, so the same figure means the same thing on every device.
-
Abelia
Water below 39%
Happy between 45% and 85%
-
Aeonium
Water below 18%
Happy between 20% and 42%
Rarely needs watering once established
-
African Violet
Water below 44%
Happy between 48% and 74%
-
Agave
Water below 12%
Happy between 14% and 35%
Rarely needs watering once established
-
Agrimony
Water below 44%
Happy between 50% and 85%
-
Alchemilla
Water below 49%
Happy between 55% and 85%
-
Almond tree, young
Water below 59%
Happy between 65% and 92%
-
Aloe Vera
Water below 18%
Happy between 20% and 40%
Rarely needs watering once established
-
Alpine Strawberry
Water below 74%
Happy between 80% and 92%
-
Aluminium Plant
Water below 40%
Happy between 44% and 68%
-
Angelica
Water below 64%
Happy between 70% and 92%
-
Anise Hyssop
Water below 39%
Happy between 45% and 75%
Rarely needs watering once established
-
Anthurium
Water below 48%
Happy between 52% and 78%
-
Aphelandra
Water below 54%
Happy between 58% and 82%
-
Apple tree, young
Water below 59%
Happy between 65% and 92%
-
Apricot tree, young
Water below 59%
Happy between 65% and 92%
-
Areca Palm
Water below 45%
Happy between 49% and 75%
-
Arnica
Water below 44%
Happy between 50% and 85%
-
Arrowhead Plant
Water below 40%
Happy between 44% and 70%
-
Ashwagandha
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Asparagus
Water below 49%
Happy between 55% and 85%
-
Aubergine
Water below 49%
Happy between 55% and 85%
-
Autoflowering Cannabis
Water below 44%
Happy between 50% and 74%
-
Azalea
Water below 64%
Happy between 70% and 92%
-
Barrel Cactus
Water below 12%
Happy between 14% and 35%
Rarely needs watering once established
-
Basil
Water below 69%
Happy between 75% and 92%
-
Bay
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Beech
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Beetroot
Water below 44%
Happy between 50% and 85%
-
Begonia
Water below 64%
Happy between 70% and 92%
-
Begonia Rex
Water below 48%
Happy between 52% and 78%
-
Berberis
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Bergamot
Water below 54%
Happy between 60% and 85%
-
Bilberry
Water below 64%
Happy between 70% and 92%
-
Birds Nest Fern
Water below 55%
Happy between 59% and 82%
-
Blackberry
Water below 44%
Happy between 50% and 85%
-
Blackcurrant
Water below 44%
Happy between 50% and 85%
-
Blueberry
Water below 64%
Happy between 70% and 92%
-
Borage
Water below 44%
Happy between 50% and 85%
-
Borlotti Bean
Water below 49%
Happy between 55% and 85%
-
Boston Fern
Water below 58%
Happy between 60% and 85%
-
Box, buxus
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Boysenberry
Water below 44%
Happy between 50% and 85%
-
Broad Bean
Water below 49%
Happy between 55% and 85%
-
Broccoli
Water below 49%
Happy between 55% and 85%
-
Bromeliad
Water below 40%
Happy between 44% and 70%
-
Broom
Water below 19%
Happy between 25% and 75%
Rarely needs watering once established
-
Brussels Sprout
Water below 49%
Happy between 55% and 85%
-
Buddleia
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Burdock
Water below 44%
Happy between 50% and 85%
-
Butternut Squash
Water below 59%
Happy between 65% and 92%
-
Cabbage
Water below 49%
Happy between 55% and 85%
-
Calamondin
Water below 54%
Happy between 60% and 85%
-
Calathea
Water below 55%
Happy between 58% and 82%
-
Calendula
Water below 44%
Happy between 50% and 85%
-
California Poppy
Water below 19%
Happy between 25% and 75%
Rarely needs watering once established
-
Camelina
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Camellia
Water below 59%
Happy between 65% and 92%
-
Cannabis (early flower)
Water below 50%
Happy between 56% and 78%
-
Cannabis (late flower and flush)
Water below 42%
Happy between 48% and 72%
-
Cannabis (seedling)
Water below 44%
Happy between 50% and 72%
-
Cannabis (vegetative)
Water below 48%
Happy between 54% and 78%
-
Cape Gooseberry
Water below 49%
Happy between 55% and 85%
-
Caraway
Water below 49%
Happy between 55% and 85%
-
Cardoon
Water below 49%
Happy between 55% and 85%
-
Carrot
Water below 59%
Happy between 65% and 92%
-
Cast Iron Plant
Water below 28%
Happy between 30% and 58%
Rarely needs watering once established
-
Catmint
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Catnip
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Cauliflower
Water below 49%
Happy between 55% and 85%
-
CBD Hemp
Water below 44%
Happy between 50% and 74%
-
Ceanothus
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Celeriac
Water below 64%
Happy between 70% and 92%
-
Celery
Water below 74%
Happy between 80% and 92%
-
Chamomile
Water below 44%
Happy between 50% and 85%
-
Cherry laurel
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Cherry tree, young
Water below 59%
Happy between 65% and 92%
-
Chervil
Water below 64%
Happy between 70% and 92%
-
Chicory
Water below 64%
Happy between 70% and 92%
-
Chilean Guava
Water below 59%
Happy between 65% and 92%
-
Chilli
Water below 54%
Happy between 60% and 85%
-
Chinese Cabbage
Water below 64%
Happy between 70% and 92%
-
Chinese Evergreen
Water below 40%
Happy between 45% and 72%
-
Chinese Money Plant
Water below 35%
Happy between 40% and 65%
-
Chives
Water below 64%
Happy between 70% and 92%
-
Chokeberry
Water below 49%
Happy between 55% and 85%
-
Christmas Cactus
Water below 30%
Happy between 34% and 58%
-
Cistus
Water below 19%
Happy between 25% and 75%
Rarely needs watering once established
-
Cobnut, young
Water below 59%
Happy between 65% and 92%
-
Coleus
Water below 54%
Happy between 58% and 82%
-
Comfrey
Water below 59%
Happy between 65% and 92%
-
Coriander
Water below 64%
Happy between 70% and 92%
-
Corn Salad
Water below 64%
Happy between 70% and 92%
-
Cosmos
Water below 39%
Happy between 45% and 85%
-
Cotoneaster
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Courgette
Water below 44%
Happy between 50% and 85%
-
Crab apple, young
Water below 59%
Happy between 65% and 92%
-
Cranberry
Water below 74%
Happy between 80% and 92%
-
Croton
Water below 48%
Happy between 52% and 78%
-
Crown of Thorns
Water below 20%
Happy between 22% and 42%
Rarely needs watering once established
-
Cucumber
Water below 44%
Happy between 50% and 85%
-
Cumin
Water below 44%
Happy between 50% and 85%
-
Curry Leaf
Water below 49%
Happy between 55% and 85%
-
Curry Plant
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Cyclamen
Water below 44%
Happy between 48% and 74%
-
Dahlia
Water below 59%
Happy between 65% and 92%
-
Damiana
Water below 19%
Happy between 25% and 75%
Rarely needs watering once established
-
Damson tree, young
Water below 59%
Happy between 65% and 92%
-
Delphinium
Water below 54%
Happy between 60% and 85%
-
Deutzia
Water below 44%
Happy between 50% and 85%
-
Dill
Water below 59%
Happy between 65% and 92%
-
Dogwood
Water below 54%
Happy between 60% and 85%
-
Donkey Tail
Water below 15%
Happy between 17% and 38%
Rarely needs watering once established
-
Dracaena
Water below 32%
Happy between 35% and 62%
-
Dumb Cane
Water below 44%
Happy between 48% and 74%
-
Easter Cactus
Water below 30%
Happy between 34% and 58%
-
Echeveria
Water below 15%
Happy between 17% and 38%
Rarely needs watering once established
-
Echinacea
Water below 39%
Happy between 45% and 75%
Rarely needs watering once established
-
Edamame
Water below 44%
Happy between 50% and 85%
-
Elaeagnus
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Elderberry
Water below 49%
Happy between 55% and 85%
-
Elecampane
Water below 59%
Happy between 65% and 92%
-
Endive
Water below 64%
Happy between 70% and 92%
-
English Ivy
Water below 44%
Happy between 48% and 74%
-
Enkianthus
Water below 59%
Happy between 65% and 92%
-
Epazote
Water below 44%
Happy between 50% and 85%
-
Escallonia
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Euonymus
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Evening Primrose
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Feijoa
Water below 49%
Happy between 55% and 85%
-
Fenugreek
Water below 49%
Happy between 55% and 85%
-
Feverfew
Water below 44%
Happy between 50% and 85%
-
Fibre Hemp
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Ficus Audrey
Water below 40%
Happy between 44% and 70%
-
Fiddle Leaf Fig
Water below 40%
Happy between 44% and 70%
-
Fig tree, young
Water below 54%
Happy between 60% and 85%
-
Flax
Water below 44%
Happy between 50% and 85%
-
Florence Fennel
Water below 64%
Happy between 70% and 92%
-
Flowering Currant
Water below 44%
Happy between 50% and 85%
-
Forsythia
Water below 44%
Happy between 50% and 85%
-
Fothergilla
Water below 59%
Happy between 65% and 92%
-
Foxglove
Water below 49%
Happy between 55% and 85%
-
French Bean
Water below 49%
Happy between 55% and 85%
-
Friendship Plant
Water below 44%
Happy between 48% and 72%
-
Fuchsia
Water below 64%
Happy between 70% and 92%
-
Gardenia
Water below 64%
Happy between 70% and 92%
-
Garlic
Water below 64%
Happy between 70% and 92%
-
Garlic Chives
Water below 64%
Happy between 70% and 92%
-
Geranium, pelargonium
Water below 34%
Happy between 40% and 75%
-
Gherkin
Water below 44%
Happy between 50% and 85%
-
Ginkgo
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Ginseng
Water below 59%
Happy between 65% and 92%
-
Globe Artichoke
Water below 49%
Happy between 55% and 85%
-
Goji Berry
Water below 34%
Happy between 40% and 85%
-
Goldenrod
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Gooseberry
Water below 44%
Happy between 50% and 85%
-
Gorse
Water below 19%
Happy between 25% and 75%
Rarely needs watering once established
-
Gotu Kola
Water below 64%
Happy between 70% and 92%
-
Grape Ivy
Water below 40%
Happy between 44% and 70%
-
Grapevine
Water below 49%
Happy between 55% and 85%
-
Greengage tree, young
Water below 59%
Happy between 65% and 92%
-
Griselinia
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Guava
Water below 54%
Happy between 60% and 85%
-
Hardy Fuchsia
Water below 49%
Happy between 55% and 85%
-
Haworthia
Water below 18%
Happy between 20% and 40%
Rarely needs watering once established
-
Hawthorn
Water below 44%
Happy between 50% and 85%
-
Hazel
Water below 44%
Happy between 50% and 85%
-
Heartleaf Philodendron
Water below 38%
Happy between 42% and 72%
-
Heather
Water below 54%
Happy between 60% and 85%
-
Hebe
Water below 39%
Happy between 45% and 85%
Rarely needs watering once established
-
Hemp (seedling)
Water below 44%
Happy between 50% and 72%
-
Holly
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Holy Basil
Water below 64%
Happy between 70% and 92%
-
Honeyberry
Water below 54%
Happy between 60% and 85%
-
Hops
Water below 59%
Happy between 65% and 92%
-
Horehound
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Hornbeam
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Hoya
Water below 30%
Happy between 32% and 58%
-
Hydrangea
Water below 69%
Happy between 75% and 92%
-
Hyssop
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Inch Plant
Water below 44%
Happy between 48% and 72%
-
Indica-dominant Cannabis
Water below 44%
Happy between 50% and 74%
-
Industrial Hemp
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Italian Cypress
Water below 19%
Happy between 25% and 75%
Rarely needs watering once established
-
Jade Plant
Water below 18%
Happy between 20% and 40%
Rarely needs watering once established
-
Japanese Wineberry
Water below 44%
Happy between 50% and 85%
-
Jerusalem Artichoke
Water below 49%
Happy between 55% and 85%
-
Jerusalem Sage
Water below 19%
Happy between 25% and 75%
Rarely needs watering once established
-
Jostaberry
Water below 44%
Happy between 50% and 85%
-
Juniper
Water below 19%
Happy between 25% and 75%
Rarely needs watering once established
-
Kai Lan
Water below 49%
Happy between 55% and 85%
-
Kalanchoe
Water below 20%
Happy between 22% and 42%
Rarely needs watering once established
-
Kale
Water below 49%
Happy between 55% and 85%
-
Kentia Palm
Water below 40%
Happy between 44% and 70%
-
Kerria
Water below 44%
Happy between 50% and 85%
-
Kiwi
Water below 49%
Happy between 55% and 85%
-
Kohlrabi
Water below 49%
Happy between 55% and 85%
-
Kumquat
Water below 54%
Happy between 60% and 85%
-
Land Cress
Water below 64%
Happy between 70% and 92%
-
Laurustinus
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Lavender
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Lawson Cypress
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Leek
Water below 64%
Happy between 70% and 92%
-
Lemon Balm
Water below 54%
Happy between 60% and 85%
-
Lemon Thyme
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Lemon tree
Water below 54%
Happy between 60% and 85%
-
Lemon Verbena
Water below 44%
Happy between 50% and 85%
-
Lemongrass
Water below 64%
Happy between 70% and 92%
-
Lettuce
Water below 64%
Happy between 70% and 92%
-
Leyland cypress
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Lilac
Water below 44%
Happy between 50% and 85%
-
Lime tree
Water below 54%
Happy between 60% and 85%
-
Lingonberry
Water below 64%
Happy between 70% and 92%
-
Liquorice
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Living Stones
Water below 8%
Happy between 10% and 30%
Rarely needs watering once established
-
Loganberry
Water below 44%
Happy between 50% and 85%
-
Loquat, young
Water below 54%
Happy between 60% and 85%
-
Lovage
Water below 59%
Happy between 65% and 92%
-
Madder
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Mahonia
Water below 39%
Happy between 45% and 85%
-
Maidenhair Fern
Water below 62%
Happy between 65% and 88%
-
Majesty Palm
Water below 52%
Happy between 56% and 80%
-
Mangetout
Water below 59%
Happy between 65% and 92%
-
Marigold
Water below 49%
Happy between 55% and 85%
-
Marjoram
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Marrow
Water below 44%
Happy between 50% and 85%
-
Marshmallow
Water below 64%
Happy between 70% and 92%
-
Meadowsweet
Water below 64%
Happy between 70% and 92%
-
Medlar tree, young
Water below 59%
Happy between 65% and 92%
-
Melon
Water below 49%
Happy between 55% and 85%
-
Milk Thistle
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Mini Monstera
Water below 42%
Happy between 45% and 72%
-
Mint
Water below 54%
Happy between 60% and 85%
-
Mizuna
Water below 64%
Happy between 70% and 92%
-
Mock Orange
Water below 44%
Happy between 50% and 85%
-
Money Tree
Water below 42%
Happy between 45% and 72%
-
Monstera
Water below 42%
Happy between 45% and 72%
-
Motherwort
Water below 44%
Happy between 50% and 85%
-
Mugo Pine
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Mugwort
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Mulberry tree, young
Water below 59%
Happy between 65% and 92%
-
Mullein
Water below 19%
Happy between 25% and 75%
Rarely needs watering once established
-
Mustard Greens
Water below 64%
Happy between 70% and 92%
-
Nasturtium
Water below 34%
Happy between 40% and 75%
-
Nectarine tree, young
Water below 59%
Happy between 65% and 92%
-
Nerve Plant
Water below 58%
Happy between 60% and 84%
-
Nettle
Water below 59%
Happy between 65% and 92%
-
Never Never Plant
Water below 54%
Happy between 58% and 82%
-
Norfolk Island Pine
Water below 44%
Happy between 48% and 74%
-
Okra
Water below 54%
Happy between 60% and 85%
-
Oleander
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Olive
Water below 24%
Happy between 30% and 85%
-
Onion
Water below 64%
Happy between 70% and 92%
-
Orange tree
Water below 54%
Happy between 60% and 85%
-
Oregano
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Pak Choi
Water below 64%
Happy between 70% and 92%
-
Panda Plant
Water below 16%
Happy between 18% and 40%
Rarely needs watering once established
-
Pansy and viola
Water below 64%
Happy between 70% and 92%
-
Parlour Palm
Water below 45%
Happy between 49% and 74%
-
Parsley
Water below 64%
Happy between 70% and 92%
-
Parsnip
Water below 54%
Happy between 60% and 85%
-
Passion Fruit
Water below 49%
Happy between 55% and 85%
-
Passionflower
Water below 44%
Happy between 50% and 85%
-
Patty Pan Squash
Water below 44%
Happy between 50% and 85%
-
Pea
Water below 59%
Happy between 65% and 92%
-
Peace Lily
Water below 50%
Happy between 55% and 80%
-
Peach tree, young
Water below 59%
Happy between 65% and 92%
-
Pear tree, young
Water below 59%
Happy between 65% and 92%
-
Pencil Cactus
Water below 16%
Happy between 18% and 40%
Rarely needs watering once established
-
Peony
Water below 44%
Happy between 50% and 85%
-
Peperomia
Water below 32%
Happy between 35% and 60%
-
Perilla
Water below 59%
Happy between 65% and 92%
-
Petunia
Water below 64%
Happy between 70% and 92%
-
Philodendron Birkin
Water below 40%
Happy between 44% and 70%
-
Philodendron Xanadu
Water below 40%
Happy between 44% and 70%
-
Photinia, red robin
Water below 39%
Happy between 45% and 85%
Rarely needs watering once established
-
Photoperiod Cannabis
Water below 48%
Happy between 54% and 78%
-
Pieris
Water below 64%
Happy between 70% and 92%
-
Plum tree, young
Water below 59%
Happy between 65% and 92%
-
Polka Dot Begonia
Water below 48%
Happy between 52% and 78%
-
Polka Dot Plant
Water below 52%
Happy between 56% and 80%
-
Pomegranate
Water below 39%
Happy between 45% and 85%
-
Ponytail Palm
Water below 20%
Happy between 22% and 45%
Rarely needs watering once established
-
Potato
Water below 59%
Happy between 65% and 92%
-
Potentilla
Water below 39%
Happy between 45% and 85%
-
Pothos
Water below 35%
Happy between 40% and 70%
-
Prayer Plant
Water below 55%
Happy between 58% and 82%
-
Prickly Pear
Water below 14%
Happy between 16% and 38%
Rarely needs watering once established
-
Privet
Water below 34%
Happy between 40% and 75%
Rarely needs watering once established
-
Pumpkin
Water below 59%
Happy between 65% and 92%
-
Purple Heart
Water below 34%
Happy between 38% and 64%
-
Purslane
Water below 44%
Happy between 50% and 85%
-
Pyracantha
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Quince tree, young
Water below 59%
Happy between 65% and 92%
-
Radish
Water below 64%
Happy between 70% and 92%
-
Raspberry
Water below 44%
Happy between 50% and 85%
-
Redcurrant
Water below 44%
Happy between 50% and 85%
-
Rhodiola
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Rhododendron
Water below 64%
Happy between 70% and 92%
-
Rhubarb
Water below 54%
Happy between 60% and 85%
-
Ribwort Plantain
Water below 39%
Happy between 45% and 85%
-
Rocket
Water below 69%
Happy between 75% and 92%
-
Roman Chamomile
Water below 39%
Happy between 45% and 75%
Rarely needs watering once established
-
Rose
Water below 44%
Happy between 50% and 85%
-
Rose of Sharon
Water below 44%
Happy between 50% and 85%
-
Rosemary
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Rowan
Water below 44%
Happy between 50% and 85%
-
Rubber Plant
Water below 35%
Happy between 40% and 68%
-
Rue
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Runner bean
Water below 49%
Happy between 55% and 85%
-
Saffron Crocus
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Sage
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Sago Palm
Water below 26%
Happy between 30% and 52%
Rarely needs watering once established
-
Salad Burnet
Water below 49%
Happy between 55% and 85%
-
Salsify
Water below 54%
Happy between 60% and 85%
-
Salvia
Water below 39%
Happy between 45% and 85%
-
Samphire
Water below 79%
Happy between 85% and 92%
-
Santolina
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Saskatoon
Water below 49%
Happy between 55% and 85%
-
Satin Pothos
Water below 34%
Happy between 38% and 64%
-
Sativa-dominant Cannabis
Water below 50%
Happy between 56% and 78%
-
Scorzonera
Water below 54%
Happy between 60% and 85%
-
Scots Pine
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Sea Buckthorn
Water below 29%
Happy between 35% and 85%
-
Sedum
Water below 15%
Happy between 17% and 38%
Rarely needs watering once established
-
Shallot
Water below 64%
Happy between 70% and 92%
-
Shrub Rose
Water below 49%
Happy between 55% and 85%
-
Skimmia
Water below 59%
Happy between 65% and 92%
-
Sloe
Water below 44%
Happy between 50% and 85%
-
Snake Plant
Water below 20%
Happy between 22% and 45%
Rarely needs watering once established
-
Soapwort
Water below 44%
Happy between 50% and 85%
-
Sorrel
Water below 64%
Happy between 70% and 92%
-
Southernwood
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Spider Plant
Water below 40%
Happy between 45% and 72%
-
Spinach
Water below 74%
Happy between 80% and 92%
-
Spiraea
Water below 44%
Happy between 50% and 85%
-
Spring onion
Water below 64%
Happy between 70% and 92%
-
St Johns Wort
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Staghorn Fern
Water below 50%
Happy between 54% and 78%
-
Stevia
Water below 49%
Happy between 55% and 85%
-
Strawberry
Water below 74%
Happy between 80% and 92%
-
String of Bananas
Water below 18%
Happy between 20% and 40%
Rarely needs watering once established
-
String of Hearts
Water below 20%
Happy between 22% and 42%
Rarely needs watering once established
-
String of Pearls
Water below 18%
Happy between 20% and 40%
Rarely needs watering once established
-
Stromanthe
Water below 55%
Happy between 59% and 82%
-
Summer Savory
Water below 44%
Happy between 50% and 85%
-
Sunflower
Water below 49%
Happy between 55% and 85%
-
Swede
Water below 44%
Happy between 50% and 85%
-
Sweet chestnut, young
Water below 59%
Happy between 65% and 92%
-
Sweet Cicely
Water below 59%
Happy between 65% and 92%
-
Sweet pea
Water below 49%
Happy between 55% and 85%
-
Sweet pepper
Water below 64%
Happy between 70% and 92%
-
Sweet Potato
Water below 29%
Happy between 35% and 85%
-
Sweet Woodruff
Water below 59%
Happy between 65% and 92%
-
Sweet Wormwood
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Sweetcorn
Water below 44%
Happy between 50% and 85%
-
Swiss Chard
Water below 64%
Happy between 70% and 92%
-
Tamarisk
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Tansy
Water below 44%
Happy between 50% and 85%
-
Tarragon
Water below 49%
Happy between 55% and 85%
-
Tayberry
Water below 44%
Happy between 50% and 85%
-
Thai Basil
Water below 69%
Happy between 75% and 92%
-
Thuja, western red cedar
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Thyme
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Ti Plant
Water below 44%
Happy between 48% and 74%
-
Tobacco
Water below 49%
Happy between 55% and 85%
-
Tomatillo
Water below 54%
Happy between 60% and 85%
-
Tomato
Water below 54%
Happy between 60% and 85%
-
Turnip
Water below 44%
Happy between 50% and 85%
-
Umbrella Plant
Water below 38%
Happy between 42% and 68%
-
Valerian
Water below 54%
Happy between 60% and 85%
-
Venus Flytrap
Water below 74%
Happy between 80% and 92%
-
Vervain
Water below 44%
Happy between 50% and 85%
-
Viburnum
Water below 44%
Happy between 50% and 85%
-
Vietnamese Coriander
Water below 64%
Happy between 70% and 92%
-
Walnut tree, young
Water below 59%
Happy between 65% and 92%
-
Watercress
Water below 79%
Happy between 85% and 92%
-
Watermelon
Water below 54%
Happy between 60% and 85%
-
Watermelon Peperomia
Water below 34%
Happy between 38% and 62%
-
Weeping Fig
Water below 40%
Happy between 44% and 70%
-
Weigela
Water below 44%
Happy between 50% and 85%
-
Weld
Water below 44%
Happy between 50% and 85%
-
Whitecurrant
Water below 44%
Happy between 50% and 85%
-
Willow
Water below 64%
Happy between 70% and 92%
-
Winter Savory
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Witch Hazel
Water below 54%
Happy between 60% and 85%
-
Woad
Water below 44%
Happy between 50% and 85%
-
Wood Betony
Water below 44%
Happy between 50% and 85%
-
Worcesterberry
Water below 44%
Happy between 50% and 85%
-
Wormwood
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Yarrow
Water below 29%
Happy between 35% and 75%
Rarely needs watering once established
-
Yew, taxus
Water below 24%
Happy between 30% and 75%
Rarely needs watering once established
-
Yucca
Water below 22%
Happy between 24% and 48%
Rarely needs watering once established
-
ZZ Plant
Water below 20%
Happy between 22% and 45%
Rarely needs watering once established
