Science · Plants, Natives & Crops
Arrowleaf Clover
Arrowleaf clover is a relatively late-maturing annual used to extend spring forage production and contribute biologically fixed nitrogen. It favors well-drained soils, while hard seed can support regeneration but complicate establishment and volunteer management.
Profile
- Growth habit
- Mostly upright stems, commonly 3–4 feet tall.
- Roots
- Deep taproot may reach approximately 4.5 feet.
- Soil pH
- Oregon State lists a tolerated range of approximately 5.6–8.4.
- Seed
- A high hard-seed proportion makes scarification important for reliable establishment.
- Nitrogen
- Fixes atmospheric nitrogen through effective nodulation.
Water & soil context
- Moisture (VWC)
- The cited publications do not provide numeric volumetric water content sensor targets.
- Salinity tolerance
- Oregon State describes moderate sensitivity to salinity, without a numeric threshold.
- Drought tolerance
- Not well suited to light-textured, droughty soils with low fertility.
Illustrative monitoring-depth band
3–8 in
Editorial placement example, not a validated optimum or total rooting depth. Confirm the site's root distribution and soil horizons; multiple depths may be needed.
Oregon State gives an adaptation range of roughly 18–25 inches of minimum precipitation or irrigation, not a universal irrigation prescription. Poorly drained, wet soils are unsuitable.
Problems to watch
- Poor drainage can cause stand failure.
- Unscarified hard seed can reduce immediate germination.
- Reseeding requires enough flowering and seed maturation before removal or heavy grazing.
Stress signs
- The cited sources do not provide a reliable crop-specific visual stress checklist.
Where you'll find it
- Forage
- Soil-improving cover crop
- Wildlife forage
More plants, natives & crops
Published botanical and soil references are distinct from GroundWorx product guidance. Moisture thresholds and monitoring depths require site calibration; sources do not establish product performance or diagnose stress.