Alfalfa as a Plant Growth Stimulant has been used for many years, particularly by rose growers and horticulturists. Its not-so-well-known growth booster is called triacontanol, which fertilizer companies can extract from the plant as an alcohol ester compound. There are three commonly found ways to utilize this powerful addition to your organic arsenal: buy alfalfa meal, which is N-P-K rated often as 3-1-1, but this varies depending on the source, buy some rabbit feed, which is usually alfalfa pellets, or get hold of a bale of alfalfa. Some vermicompost tea/extract producers use alfalfa meal for its simplicity of use; when using this, I add it directly into the brewer at the rate of 1 tablespoon per gallon of water. If you’re using rabbit feet, just soak the pellets until they break apart, then add to the brewer.
If using a bale of alfalfa, you can soak some in a bucket of water to help release the growth stimulants so they can go into solution. Some growers recommend a cup of baled alfalfa per gallon of brew water. Any of the three sources of alfalfa will be relatively fast acting due to the high nitrogen content, so take care not to use too much of it. Alfalfa is also a very good inoculant and compost starter because of the nitrogen. As always, there are many more benefits than just the N-P-K; when using an organic, soil-based product, it will also benefit your soil and plants (and you!) by its large amount of diverse micronutrients.
Here’s some links with alfalfa info to follow up on: