A close-up of the green, lightly streaked foliage of a Hosta Green Flash plant

Hosta ‘Green Flash’: Plant Profile and Growing Details

ByJamie Dolan July 30, 2011June 16, 2026

A short plant profile for Hosta ‘Green Flash’, with the key details worth knowing if you are considering one for the garden.

Mature size: about 20 inches high by 39 inches wide.
Foliage: leaves roughly 11 inches long by 6 inches wide, dark green in the center with a chartreuse to gold margin, forming a distinct upright mound.
Flowers: purple, on tall scapes exceeding 48 inches high at maturity.
Growth rate: fast.
Origin: a sport of ‘Ogon Tachi’, found at Q and Z Nursery.

? When can you plant where you live?

I built a free little tool for exactly this question — The Garden Almanac. Type in your ZIP code and it gives you your USDA hardiness zone, your average last and first frost dates, and a planting calendar tuned to your spot — when to start seeds, set out transplants, and sow. It runs right in your browser, no account needed. Find your frost dates & planting calendar →

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