Phacelia (Lacy Phacelia) in Zone 8a & 8b

Phacelia tanacetifolia

When to plant phacelia (lacy phacelia) in zone 8b

Zones 8a and 8b share the same average frost dates in our data, so this page covers both.

Method: Direct sow: Direct-sow outside. Phacelia (Lacy Phacelia) doesn't transplant well, or doesn't need the extra time indoors.

Start indoors	Not typically started indoors
Direct sow / transplant outside	Mar 4–Mar 11
Estimated bloom	May 13–May 20 (~70 days after direct-sowing)

Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 2.5-3.5 ft.

Phacelia, also called purple tansy or lacy phacelia, is grown less for cutting than for what it does in the garden: it's an outstanding nectar source for honeybees and draws beneficial insects reliably wherever it's planted.

How phacelia (lacy phacelia) fits zone 8's season

Zone 8b's frost-free window runs about 230 days, from March 25 to November 10. Phacelia (Lacy Phacelia) needs about 70 days from sowing to first harvest.

Good companions

No standout companions recorded yet for Phacelia (Lacy Phacelia).

Where to buy phacelia seeds

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See it growing

Search YouTube for "growing phacelia (lacy phacelia)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)

← Back to the full zone 8b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →

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Growing Phacelia (Lacy Phacelia) in USDA zone 8b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.

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