Answer: Fertilizer is usually applied in spring, as your plants begin to grow - fertilizing in fall or winter when your plants are resting can make them grow, and the new growth will be subject to frost damage. So, take your cue from your plants; when they begin to grow in the spring, apply fertilizer. There are many kinds of fertilizers on the market. A general purpose 10-10-10 can be used, or you can purchase the specially formulated citrus food and evergreen food which contains micronutrients tailor made for these types of plants. Whichever you use, be sure to apply in amounts and with the frequency recommended on the package label.
Both fruit trees and evergreens can be pruned in the spring. It isn't necessary to prune either, but you can if you want to remove an errant branch or control the size.
Eggplant is an annual plant and will die off this winter. Or, if you're finished harvesting the fruits, you can simply pull the plants up out of the ground.
Best wishes with your garden!
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