SOWING INSTRUCTIONS
Depth:
Just cover; requires darkness.
Seed To Bloom:
14-16 weeks
Starting Indoors:
Recommended. 8-10 weeks before last frost. Keep at 65-75°F in darkness until germination occurs. If no germination after four weeks, chill in refrigerator for two weeks, then return to warmth.
Starting Outdoors:
Not recommended.
PLACEMENT & CULTIVATION
Small but mighty, slender vervain has vivid violet flowers in lightly fragrant clusters that refuse to stop blooming, even laughing off the first frosts of fall. The many-branched stems root along their length to make flower-filled drifts, becoming a groundcover where hardy. A pollinator magnet for edging hot, sunny gardens in company with calamint and agastache and spectacular in large containers.
Watering Details:
Moderate drought tolerance once established but best with 1" of water per week.
Soil pH:
Slightly acid to alkaline
Fertilizer:
Mix in a few inches of compost prior to planting.