Crimson clover is a nitrogen-fixing cover crop that transforms depleted soil while putting on a stunning show of crimson-red blooms. This hardy annual thrives in zones 6 through 9, reaching 12 to 36 inches tall over 70 to 79 days of growth. Unlike many cover crops that disappear into the background, crimson clover gives you a choice: till it back as nutrient-rich green manure to supercharge your soil, or let it flower for its striking allium-like blooms that attract pollinators and add visual interest to your garden beds.
Partial Shade
Moderate
6-9
36in H x 12in W
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Moderate
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Crimson clover is one of gardening's most effective weed suppressors, smothering competition while quietly fixing nitrogen in the soil below. The deep crimson flowers that emerge late in the season are as ornamental as they are functional, making this cover crop equally at home in a working vegetable garden or a pollinator-focused landscape. Sow it six to eight weeks before your first fall frost, and it will overwinter in zones 6 and warmer, establishing itself through winter to deliver maximum soil benefits come spring.
Crimson clover serves as a cover crop and green manure, tilled back into the soil to increase nitrogen content and improve soil structure and tilth. It also functions as a weed suppressant, outcompeting unwanted plants while you build your soil. Gardeners often allow it to flower for its ornamental value and to support pollinator populations before incorporating it into the bed.
No timeline data available yet for this variety.
Sow seeds outdoors one-quarter inch deep, six to eight weeks before your average first fall frost date. Crimson clover can overwinter in USDA zones 6 and warmer, establishing itself through the cold months.
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“Crimson clover has long been valued as a cover crop and green manure in agriculture, particularly prized for its ability to rehabilitate nitrogen-depleted soils. This heirloom variety carries the gardening wisdom of generations who recognized that building soil fertility didn't require chemicals, just the right plant at the right time. Its journey from agricultural staple to home garden essential reflects a broader movement toward soil health and regenerative growing practices.”