key growing information

How to Grow Phacelia From Seed

How to grow phacelia from seed: germination in cool soil, direct sowing rates for beds or cover crops, succession sowing, cutting stage, soil and benefits for pollinators.
By Hensley’s Seed Co.

Lacy Phacelia (Purple Tansy) - Key Growing Information

A stand of blossoming phacelia at a research farm.

DAYS TO GERMINATION:

Allow 7–14 days at 55–68°F (13–20°C).

SOWING:

Sowing in place is recommended. As soon as the soil can be worked, sow thinly in rows at 6 seeds per foot, 1/8–¼" deep. For mass plantings or cover cropping, use 3 oz. per 1,000 sq. ft. or 7 lb. per acre. Cool soil gives the best germination; keep the surface moist until seedlings emerge. For flowers all season, make 2–3 sowings 2 weeks apart.

LIGHT PREFERENCE:

Full sun.

PLANT HEIGHT:

Grows about 30–40" tall.

PLANT SPACING:

Space plants 2–12" apart.

HARDINESS ZONES:

Grown as an annual.

HARVEST:

For fresh use, cut as the flowers just begin to open.

SOIL REQUIREMENTS:

Almost any soil with good drainage.

USES:

Draws in and sustains beneficial insects in beds, borders and cover-crop plantings, and is a rich nectar source for honeybees. Also an informal cut flower.
SCIENTIFIC NAME: Phacelia tanacetifolia

ALTERNATE NAMES:

Lacy phacelia, blue tansy, purple tansy.

Source and attribution

Migrated library resource. Original named people, organizations, research, and factual provenance are retained.