This publication discusses the many types of fertilizers and soil amendments available for organic plant production. Fertilizer formulations, nutrient availability, and application practices for common organic products are also explained. ...
Using a thermometer to monitor the soil takes the guess work out of when to plant vegetables.
Wait until your soil warms up about 70 degrees to plant cucumbers.
Plant spinach when soil is cool, then other heat-tolerant greens in the summer.
You don't need soil to grow a productive garden
A few days of sunny weather isn't enough to warm the soil