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Gentiana scabra var. buergeri
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- Planting Gentians: Getting the Soil, the Aspect and the Depth Right the First Time
- Gentian Care: Cool Roots, Sharp Drainage and the Lime Question That Decides Everything
- Why Gentians Do Not Flower, and Why the Ones That Do Stay Shut All Day
- The Gentian Year: A Season by Season Calendar of What to Do and What to Leave Alone
- Gentian Problems: Yellowing Leaves, Rot at the Collar and Slugs in the Buds
Pests and diseases (3)
Problems recorded for this plant, most serious first.
Brown Leaf Spot
MajorDisease
Small light brown to gray-brown spots form on the leaves and enlarge into irregular lesions. When they merge the whole leaf dies and plant vigor drops sharply.
Aphids
CommonPest
Small green or black insects cluster on shoot tips and leaf undersides, crinkling the leaves and stopping growth. The honeydew they excrete supports sooty mold that blackens the foliage.
Cabbage Armyworm
CommonPest
Young larvae feed in groups on the leaf underside, eating only the tissue so the leaf turns translucent white. Larger larvae chew big holes and can strip a plant bare in a single night.
