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key growing information
How to Grow Bupleurum From Seed
How to grow bupleurum from seed for cut-flower filler: cell size and timing for transplants, direct sowing into cool soil, spacing, sun and soil, and harvest stage.
By Hensley’s Seed Co.
Bupleurum - Key Growing Information
DAYS TO GERMINATION:
Allow 14–21 days at a cool 55–60°F (13–16°C).
SOWING:
For transplants, sow into 128- or 72-cell plug flats, or your usual seedling containers, 5–8 weeks before planting out; 128-cell plugs take about 5–7 weeks and 72-cell plugs about 6–8 weeks to reach transplant size. Harden seedlings off before setting them out. For direct sowing, plant into cool soil, cover seed with 1/4" of soil, and thin as needed after true leaves form.
LIGHT PREFERENCE:
Full sun to partial shade.
PLANT HEIGHT:
24-36".
PLANT SPACING:
4–10" apart; in windy sites, plants may need support.
HARDINESS ZONES:
Grown as an annual.
HARVEST:
For fresh use, cut as the flower heads begin to color. For drying, wait until flowers are fully open and hang them.
SOIL REQUIREMENTS:
Ordinary soil with good drainage.
USES:
A great fresh or dried cut stem and a favorite bouquet filler; also adds height to the back of flower beds.
SCIENTIFIC NAME:
Bupleurum rotundifolium
ALTERNATE NAMES:
Hare's ear, thoroughwax
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