nitrogen in soil

Question

When is he best time to add nitrogen to garden soil?

Answer 1

Having a soil test taken will let you know if your soil needs Nitrogen.
Nitrogen additions to the soil will depend on the plants that you have in the garden.

Your local County Extension Office can help you with a soil test.
Here is a link to locate your closet office.

https://www.gardeningknowhow.com/extension-search/

Here are some articles that will help you.

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/understanding-nitrogen-requirements-for-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/nitrogen-plant-fertilizer.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/blood-meal-fertilizer.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/types-of-organic-fertilizer.htm
https://www.gardeningknowhow.com/edible/vegetables/vgen/fertilizer-options-for-your-vegetable-garden.htm