Organic fertilizer is easy to create by combining inexpensive ingredients purchased in bulk from farm supply stores with others made at home. Although well-aged compost provides slow-release nutrients and micronutrients, which improve garden soil over the long term, heavy-feeding vegetables, perennials, and flower bulbs require additional fertilizer to carry them through the growing season. Use homemade organic fertilizer with a balance of nitrogen, phosphorous and potassium for a swift nutrient boost to maximize your garden growing potential.
Measure out 4 parts organic seed meal, 1/2 part dolomite lime, 1/2 part gypsum, 1 part wood ashes,1 part bone meal, and 1 part kelp meal, using the large or small flower pots as volumetric measures depending on the quantity of fertilizer desired.
Thoroughly mix the measured portions in a wheelbarrow or plastic tub, using a shovel or trowel depending on the size of the pile of fertilizer to be mixed.
Add a volume of well-aged yard compost or composted manure equal to the volume of the complete mixed fertilizer ingredients. Stir the pile thoroughly with a shovel until it is evenly mixed.
Turn homemade organic fertilizer mix into the top 6 inches of garden soil with a shovel, at a rate of 2.5 gallons per 100 square feet of garden surface--about 1 gallon per 8-foot x 4-foot standard raised bed. Measure out the fertilizer mix with the milk jug or nursery pot.
Top dress heavy-feeding crops with additional compost once midway through the growing season. Store any unused organic fertilizer mix in a metal trashcan with a tight-fitting lid.