Summary
Organic fertilization management for vegetable transplant production is challenging to growers due to the slow and unpredictable release nature of organic fertilizers. Nutrients in organic fertilizers, particularly nitrogen (N), often fail to meet the demands of rapidly growing transplants in soilless substrate. This study aimed to develop fertilization guidelines for organic bell pepper (Capsicum annuum L.) transplants by evaluating the performance of one conventional fertilizer, two organic fertilizers (Drammatic, Pre-Empt), and one naturally derived fertilizer (Bio-Matrix) at a range of N rates in supporting transplant growth. Bell pepper transplants were grown in an indoor growing chamber for 28 days with weekly fertilizer application. We found that the initial nitrate-N concentration
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