15 of the Best Common Organic Fertilizers

If you wish to grow the garden organically and want to save money, try these 15 of the best organic fertilizers.

If you wish to grow the garden organically and want to save money, try these 15 of the best organic fertilizers.

The beauty is, gardening is not an exact science where beakers of measured fluids and charts of soil characteristics and plant viability are the norm. Instead, it’s an “artful science” in which intuition and “feel” have as much to do with it as knowledge and fact. Understanding the common organic fertilizers available is as simple as knowing what each offers your soil and how “available” (easily accessed) those offerings are.

Alfalfa Meal:

2.5% N, 1% P, 1.5% K
Slow to moderate
Best known as a “hay” for animals, meal is just ground up alfalfa that makes it compost faster in the soil. Best tilled in as an early spring additive, well before planting.

Bat Guano:

8% N, 6% P, 1% K
Moderate to immediate
The most common source of guano, bat guano is relatively fast in uptake and so is often used between crop rotations (mid-summer harvest / replant) or in late spring just before planting. Bird guano has higher nutrition numbers, but sea bird guano is only available in a few parts of the world.

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