I just planted my garden and things aren't even coming up quite yet. Can I spread an ammonium nitrate fertilizer now, or should I wait until the plants have a second set of leaves to avoid burning the seedling/young roots?
When and When Not to Apply Fertilizer to a Veggie Garden
Certified GKH Gardening Expert
Avoid using a commercial fertilizer on tender seedlings as it may burn the plants or roots.
Allow the plants and seeds to get a good start before applications of fertilizers.
I always use a 'light feed' when applying fertilizer, and you may want to consider organic fertilizers for plants that you will eat from.
I have listed a few links with some great information.