Every plant in the world

Species catalog

Care data, real photos from members’ collections and a community bloom calendar – for every species.

1311species in catalog
378genera
102species grown by members
★ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Genera: H

29 species

Helianthus

AsteraceaeAn annual; sow directly in place in mid-May and stake tall varieties.
Garden flower · AsteraceaeHelianthus annuusSunflowerBe the first to grow it!

Helleborus

RanunculaceaeRemove the old, spotted leaves before flowering for a better display and less fungal disease.
Garden flower · RanunculaceaeHelleborus argutifoliusBe the first to grow it!Garden flower · RanunculaceaeHelleborus foetidusBe the first to grow it!Garden flower · RanunculaceaeHelleborus nigerBe the first to grow it!Garden flower · RanunculaceaeHelleborus orientalisBe the first to grow it!Garden flower · RanunculaceaeHelleborus purpurascensBe the first to grow it!

Hemerocallis

AsphodelaceaeEach flower lasts a day but a stem keeps producing buds for weeks; toxic to cats.
Garden flower · AsphodelaceaeHemerocallis citrinaBe the first to grow it!Garden flower · AsphodelaceaeHemerocallis dumortieriBe the first to grow it!Garden flower · AsphodelaceaeHemerocallis fulvaBe the first to grow it!Garden flower · AsphodelaceaeHemerocallis lilioasphodelusBe the first to grow it!Garden flower · AsphodelaceaeHemerocallis middendorffiiBe the first to grow it!

Heuchera

SaxifragaceaeEvery 3–4 years replant deeper or divide in spring, as the crown lifts out of the soil.
Garden flower · SaxifragaceaeHeuchera americanaBe the first to grow it!Garden flower · SaxifragaceaeHeuchera micranthaBe the first to grow it!Garden flower · SaxifragaceaeHeuchera sanguineaBe the first to grow it!Garden flower · SaxifragaceaeHeuchera villosaBe the first to grow it!

Hibiscus

MalvaceaeDon't turn or move it while in bud, or the buds will drop.
Garden flower · MalvaceaeHibiscus moscheutosBe the first to grow it!Garden flower · MalvaceaeHibiscus trionumBe the first to grow it!

Hosta

AsparagaceaeProtect the emerging shoots from slugs in spring – blue-leaved kinds are tougher.
Garden flower · AsparagaceaeHosta fortuneiBe the first to grow it!Garden flower · AsparagaceaeHosta plantagineaBe the first to grow it!Garden flower · AsparagaceaeHosta sieboldianaBe the first to grow it!Garden flower · AsparagaceaeHosta sieboldiiBe the first to grow it!Garden flower · AsparagaceaeHosta undulataBe the first to grow it!

Hyacinthus

AsparagaceaeForcing needs 10–12 weeks of dark, cold (5–9 °C) pre-chilling.
Garden flower · AsparagaceaeHyacinthus orientalisHyacinthBe the first to grow it!

Hydrangea

HydrangeaceaeBlue on acidic soil, pink on alkaline; only thin out bigleaf hydrangeas in spring.
Garden flower · HydrangeaceaeHydrangea arborescensBe the first to grow it!Garden flower · HydrangeaceaeHydrangea asperaBe the first to grow it!Garden flower · HydrangeaceaeHydrangea macrophyllaBigleaf hydrangeaBe the first to grow it!Garden flower · HydrangeaceaeHydrangea paniculataBe the first to grow it!Garden flower · HydrangeaceaeHydrangea quercifoliaBe the first to grow it!Garden flower · HydrangeaceaeHydrangea serrataBe the first to grow it!
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