Melilotus officinalis This cool-season biennial is an expert at mining insoluble minerals like potassium and phosphorus from the lower levels of the soil and bringing them to the surface. Its long tap root also helps loosen hard packed soils. Yellow Blossom Sweet Clover will fix up to 125 pounds of nitrogen per acre, and with adequate moisture, will grow to 6 feet, providing tons of organic matter to your soil! This clover has demonstrated good drought tolerance, especially when planted early, just after your last frost. Recommended seeding rate: 1 pound per 1000 square feet; 15–20 pounds per acre. Pre-inoculated.

Available only in the contiguous US.