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Agastache rupestris

Agastache rupestris
sunset hyssop
Common name sunset hyssop
Family lamiaceae
Life cycle perennial (Z5-8)
Flowers soft orange (summer)
Size 3'
Light sun
Cultural notes well-drained soil
From seed germinate at room temperature with exposure to light; germination may be spotty
Flowers first year from seed sown indoors early.
detailed seed-starting info below

I got this in May at the HPS/MAG plant sale, sized like a seedling, labeled 'Apache Sunset'. Two months later, it had grown large enough to flower, although it was still a small plant. Supposedly the foliage smells like root beer - I'll have to remember to try that sometime. The original plant didn't survive the winter, and seedlings that appeared the following year didn't reach blooming size. A few years later, I purchased a new plant (this time without a cultivar name), which so far has survived at least one winter, blooming more profusely in the second year than our first specimen ever did.

Agastache rupestris
sunset hyssop
I'm not sure of this one's identity. It lives in our front lane garden, where A. rupestris once lived and may have self-seeded; it is also where I planted some A. pallida var. pallida last year, but the leaves don't look like a match for that species.

We left this plant behind in our Pennsylvania garden (and wish it well); we don't grow it in Houston.

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Seed-starting details for this plant

  1. Seed from '02 HPS/MAG distribution. Baggy 70F (4w) - 35F (5w) - 70F (3w; no G)
  2. Seed from '04 garden. Baggy 70F with light (25%G, 3d)
  3. Seed from '12 garden. Baggy 70F with light (42%G, 5-8d)

Seeds that look perfectly plump and viable just won't germinate. I guess it's finnicky about life.

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