Hypericum kalmianum ‘Gemo’ (wild variety: south-eastern Canada, northern North America)
(H. erectum ‘Gemo’)
Habit: An upright small shrub with dense shoots, 0.6-1 m tall, 0.8-1.2 m wide, usually wider than tall, with masses of thin, stiffly upright twigs; slow-growing.
Flowers: Inflorescences like umbels, conspicuous, waxy, shiny yellow, beginning of July to end of August.
Fruits: Numerous red-brown to bronze capsules, unpalatable.
Leaves: Linear to lanceolate, light green when shooting, then blue-green, yellow-green or pale yellow at beginning of November.
Demands: Only full sun, not shade, tolerates heat and drought, frost hardy; good for urban areas.
Soil: Moderately dry to fresh, slightly acidic to very alkaline (up to pH 8.5), prefers well drained soil, sandy gravel or gravel, sandy loam; does not grow well on heavy soil.
Hardiness: Zone 5b