Crop Rotation Group
Miscellaneous
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Soil
Average garden soil with excellent drainage.
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Position
Full sun.
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Frost tolerant
Good. Where winters are mild, seedlings sprout in fall and survive until spring.
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Feeding
Fast growth is encouraged by mixing a balanced organic fertilizer into the soil before planting.
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Companions
Upright larkspur makes an ideal flower to grow behind shorter mound-forming bloomers.
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Spacing
Single Plants: 11" (30cm) each way (minimum)
Rows: 11" (30cm) with 11" (30cm) row gap (minimum)
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Sow and Plant
Sow larkspur seeds where you want the plants to grow in fall, or first thing in spring. Larkspur can be transplanted with care, but plants grow best from direct-sown seeds.
Our Garden Planning Tool can produce a personalized calendar of when to sow, plant and harvest for your area.
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Notes
Well-pleased plants can grow quite tall and may need staking. In many climates, larkspur will reseed with a little encouragement. Colors include pink, purple, lavender, white and many bicolors.
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Harvesting
Larkspurs make wonderful cut flowers. As flowers fade, snip them off with scissors to keep the plants looking neat. Pull up plants when blooms become scarce.
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Troubleshooting
The biggest challenge to growing larkspur is getting the seedlings up and growing. Larkspur is poisonous to pets and horses, but is seldom nibbled due to its bitter taste.
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