How to grow Smallflower Phacelia

Phacelia dubia

Full Sun
OR
Partial Sun
Medium

Phacelia grows quickly and can be used to dig back into the soil as green manure. This is most useful in between crops in the vegetable garden, as the crop will keep the weeds seeds from germinating, and once mature, it is turned over and dug in.

Growing Smallflower phacelia from seed

Sow thinly

Aim to sow 0.04 inches (0.1 cm) deep and try to ensure a gap of at least 0.78 inches (2.0 cm). For optimal germination, soil temperature should be a minimum of 12°C / 54°F.

By our calculations*, you should look at sowing Smallflower phacelia about 35 days before your last frost date .

Transplanting Smallflower phacelia

Does not transplant easily, so sow direct.

Smallflower phacelia is tender, so ensure you wait until all danger of frost has passed in your area before considering planting outside - as a guideline, the minimum temperature outside should be approximately 12°C / 54°F.

Harvesting Smallflower phacelia

Cut back into the soil once fully grown

How long does Smallflower phacelia take to grow?

These estimates for how long Smallflower phacelia takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.

Days to Germination How long does it take Smallflower phacelia to germinate?: days
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Days to Transplant How long until I can plant out Smallflower phacelia?: + days
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Days to Maturity How long until Smallflower phacelia is ready for harvest / bloom?: + days
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Total Growing Days How long does it take to grow Smallflower phacelia?: = days

When should I plant Smallflower phacelia?

Our when to plant Smallflower phacelia estimates are relative to your last frost date.

When to sow The number of days to sow Smallflower phacelia before or after your last frost date.: 35 days before Last Frost Date

Other names for Smallflower phacelia

Interior phacelia

Phacelia dubia (L.) Trel. var. dubia