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Hosta spp.
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- How to Plant Hostas: Soil Prep, Spacing and Getting the Crown Depth Right
- Hosta Care Through the Season: Water, Feeding and Keeping Leaves Clean
- Where to Plant Hostas: Shade, Morning Sun and Why Blue Hostas Turn Green
- Hosta Year Round: What to Do Each Season and When to Do It
- Why Are My Hosta Leaves Full of Holes? Slugs, Snails and What Else Goes Wrong
- How to Divide Hostas: Splitting Clumps in Spring as the Noses Emerge
Common problems
Start from what you can see on the plant.
Pests and diseases (8)
Problems recorded for this plant, most serious first.
Rust
Disease
Small raised orange-yellow to red-brown pustules form on both leaf surfaces, then rupture and release powdery spores. Heavy infection yellows the leaves and kills them early.
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.
