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key growing information
Growing Carthamus (Safflower)
How to grow carthamus (safflower) for cut flowers: sowing direct or in plugs, seedling temperature, shade for hot climates, spacing and harvest stage.
By Hensley’s Seed Co.
Carthamus (Safflower) - Key Growing Information
DAYS TO GERMINATION:
Expect 10–14 days at 68–72°F (20–22°C).
SOWING:
Sowing in place is recommended: plant after frost danger has passed and cover the seed lightly. Once seedlings are up, they develop best at about 65°F (18°C). For transplants, sow into 50-cell plug trays or your usual containers 4–5 weeks before planting out; harden off and set out after the last frost.
LIGHT PREFERENCE:
Full sun. In the South, about 30% shade cloth or some afternoon shade helps.
PLANT HEIGHT:
18–24".
PLANT SPACING:
6–9" apart.
HARDINESS ZONES:
Grown as an annual.
HARVEST:
For fresh use, cut once flowers are starting to open and show color; stems cut before any color shows won't open later. For drying, let flowers open fully, then air dry.
SOIL REQUIREMENTS:
Ordinary soil with good drainage.
USES:
Fresh or dried cut stems.SCIENTIFIC NAME: Carthamus tinctorius
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