To get the nutrients to the roots faster when you sidedress, lightly scratch the fertilizer into the soil, being careful not to nick the roots or stem. To apply a liquid fertilizer, first dissolve or dilute it according to label instructions. Because plants close down their leaf pores when it's sunny or hot, apply foliar fertilizers early or late in the day, or during a cloudy spell. Spray them to the tops and underside of the leaves until the liquid runs off. An amendment is something that improves the soil without necessarily adding nutrients.
Amendments can make clay soil looser or sandy soil hold water better.
You can buy organic fertilizer blends that provide a range of nutrients plants need. Bloodmeal Dried animal blood. Lasts 3-4 months. Apply 3 lbs. Finely ground and steamed animal bones, used mainly as a phosphorus source.