B and T World Seeds' reference number:
USDA average, annual, minimum temperature Zone:6
Type of plant - perennial
Flower: YELLOW, dense spikes
Foliage: ell.-lin, 15-27 mm. long
Height in meters: 0.6
Parts of Hypericum hyssopifolium are considered toxic.
is included in the following B and T World Seeds flowering plant categories:
9: Alpine and Rock Garden Seed List (Hardy and Tender)
43: Herbaceous Border Plant Seed List
80: South West European Native and Introduced Plants
131: Toxic Plants
Hypericum hyssopifolium seeds will usually germinate in 30-90 days, even under good conditions germination may be erratic. Sow seeds about 1mm deep in a Well drained seed sowing mix at about 10°C.