Alfalfa as an organic gardening product provides many nutritional benefits not only for plant use, but for soil organisms as well. One very important ingredient is tricontanol, a powerful plant growth regulator. Orchid and rose growers make an alfalfa tea and spray it directly on as a foliar fertilizer. Alfalfa is very high in vitamins, plus N-P-K-Ca, Mg, and other valuable minerals. It also includes sugars, starches, proteins, fiber and 16 amino acids.
Sprinkle lightly over garden and water, or use about a handful (depending on the size) around each rose, tree, or shrub. Approximate analysis is 3-1-2. Alfalfa meal and hay used for mulch contain vitamin A, folic acid, trace minerals and the growth hormone “tricontanol.” Use at 25 pounds per 1,000 square feet or 400-800 pounds per acre.
Alfalfa helps plants create larger flowers and increases the tolerance to cold. Make alfalfa tea by soaking 1 cup of alfalfa meal per 5 gallon of water. Good for all flowering plants. Research has shown that using more is not better. At recommended rates alfalfa worked wonders on roses but it could be overused causing adverse effects.