Great St. Johnswort Picture

Great St. Johnswort
Hypericum ascyron


Yellow flowers up to 2 across in July, oval-ish leaves up to 4 long, large smooth green seed pods develop, tolerates poor soil, easy to grow, host to caterpillars of the Wavy-lined Emerald (Synchlora aerate) & Gray Hairstreak (Strymon melinus), an unusual giant.

Full Sun
5-7 tall
Plant Hardiness Zones: 3b-7a
Deer Resistant

Other names: (formerly Hypericum pyramidatum)

Native Range: ME to MN, south to DE and ne KS. Rare in CT, IN, ME, MD, MA, NH & VT

Germination - Easy: cold stratify 9 weeks, surface sow

Great St. Johnswort Seed Packet $4.00
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