Every plant in the world

Species catalog

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

1308species in catalog
377genera
98species grown by members
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Genera: H

29 species

Helianthus

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

Helleborus

RanunculaceaeRemove the old, spotted leaves before flowering for a better display and less fungal disease.
Garden flower · RanunculaceaeCorsican helleboreHelleborus argutifoliusBe the first to grow it!Garden flower · RanunculaceaeStinking helleboreHelleborus foetidusBe the first to grow it!Garden flower · RanunculaceaeChristmas roseHelleborus nigerBe the first to grow it!Garden flower · RanunculaceaeLenten roseHelleborus orientalisBe the first to grow it!Garden flower · RanunculaceaePirosló hunyorHelleborus 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 · AsphodelaceaeCitron daylilyHemerocallis citrinaBe the first to grow it!Garden flower · AsphodelaceaeDumortiers TaglilieHemerocallis dumortieriBe the first to grow it!Garden flower · AsphodelaceaeOrange daylilyHemerocallis fulvaBe the first to grow it!Garden flower · AsphodelaceaeLemon lilyHemerocallis lilioasphodelusBe the first to grow it!Garden flower · AsphodelaceaeAmur daylilyHemerocallis 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 · SaxifragaceaeAmerican alumrootHeuchera americanaBe the first to grow it!Garden flower · SaxifragaceaeCrevice alumrootHeuchera micranthaBe the first to grow it!Garden flower · SaxifragaceaeCoral bellsHeuchera sanguineaBe the first to grow it!Garden flower · SaxifragaceaeHairy alumrootHeuchera villosaBe the first to grow it!

Hibiscus

MalvaceaeDon't turn or move it while in bud, or the buds will drop.
Garden flower · MalvaceaeSwamp rose mallowHibiscus moscheutosBe the first to grow it!Garden flower · MalvaceaeFlower-of-an-hourHibiscus trionumBe the first to grow it!

Hosta

AsparagaceaeProtect the emerging shoots from slugs in spring – blue-leaved kinds are tougher.
Garden flower · AsparagaceaeFortune's plantain lilyHosta fortuneiBe the first to grow it!Garden flower · AsparagaceaeAugust lilyHosta plantagineaBe the first to grow it!Garden flower · AsparagaceaeSiebold's plantain lilyHosta sieboldianaBe the first to grow it!Garden flower · AsparagaceaeHosta sieboldiino common nameBe the first to grow it!Garden flower · AsparagaceaeWavy-leaved plantain lilyHosta undulataBe the first to grow it!

Hyacinthus

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

Hydrangea

HydrangeaceaeBlue on acidic soil, pink on alkaline; only thin out bigleaf hydrangeas in spring.
Garden flower · HydrangeaceaeSmooth hydrangeaHydrangea arborescensBe the first to grow it!Garden flower · HydrangeaceaeRough-leaved hydrangeaHydrangea asperaBe the first to grow it!Garden flower · HydrangeaceaeBigleaf hydrangeaHydrangea macrophyllaBe the first to grow it!Garden flower · HydrangeaceaePanicle hydrangeaHydrangea paniculataBe the first to grow it!Garden flower · HydrangeaceaeOakleaf hydrangeaHydrangea quercifoliaBe the first to grow it!Garden flower · HydrangeaceaeMountain hydrangeaHydrangea serrataBe the first to grow it!
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