Answer: The only way to know for sure if you are giving your plants enough fertilzer is to have a soil test done, and to follow the recommendations. On the practical side, if you enrich your soil with compost or other types of organic matter, they'll providea lot of the "stuff" that plants need to grow. Fertilizer should be used just to optimize crop performance, and is best applied at planting time, when plants flower, and again during fruit development. It sounds like your vegetable plants are performing well - the eggplant just need more light, or are lacking a nutrient that encourages flowering. You can make the most of the sun you get by placing reflectors under and around them, or growing compact varieties in pots placed in the sunniest part of your yard. To have your soil tested, contact your extension service (ph# 301/590-9638). Hope this helps!
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