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Helleborus spp.
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- Planting Hellebores: Choosing a Spot You Will Not Want to Change
- Hellebore Care: The One Job That Transforms the Plant, and the Rest of the Year
- Hellebores After Flowering: Seed Heads, Seedlings and Getting the Clump Ready for Next Winter
- Hellebores Through the Year: A Season by Season Calendar
- Hellebore Problems: Black Blotches, Collapsing Stems and Sticky Aphids
- How to Propagate Hellebores: Division for Copies, Seed for Surprises
Common problems
Start from what you can see on the plant.
Pests and diseases (9)
Problems recorded for this plant, most serious first.
Late Blight
Disease
Dark green water-soaked lesions appear on the leaves and expand quickly into brown dead tissue. White mold forms on the underside and at the lesion edge, and dark brown lesions spread to stems and fruit.
Southern Blight
Disease
The stem rots at soil level and white silky mycelium spreads over the crown and the surrounding soil surface. Brown sclerotia the size of rapeseed then form and the plant wilts and dies rapidly.
Anthracnose
Disease
Light brown to dark brown round lesions with sharp margins form on leaves and fruit, slightly sunken in the center. In wet weather salmon-pink slimy spore masses ooze out on the lesions.
Gray Mold
Disease
Water-soaked brown lesions form on flowers, fruit and leaves, densely covered by a fuzzy gray mold. Fruit rots and drops, and decay continues in storage after harvest.
Downy Mildew
Disease
Pale yellow to yellow-brown angular lesions form on the upper leaf surface with a gray-purple mold in the matching spot underneath. Lesions merge, the leaves die back and the plant declines early.
