Tuesday, February 15, 2011

Fertilizing Indoor Plants

Plants need different elements from the soil to grow.  If they are not present in the right amount the plants will not be as healthy or grow as they should.  This is the reason plants need fertilizer, to add the missing elements (nitrogen, phosphorous, and potassium).  However, keep in mind that you can give your plants too much fertilizer and that will have the opposite effect you are going for. 

Crassula ovata (Jade plant) in terracotta pot ...Image via WikipediaThe same species of plant that is grown indoors or outdoors will have different fertilizing needs.  Plants that are grown indoors will not need as much fertilizer as the ones grown outside.  The rate of growth is slower indoors and you can harm your plant by over-fertilizing it. 

How do you know how much fertilizer to give to your plants and when to feed it to them?  If you have purchased a plant meant for the indoors chances are the information tag it comes with will give fertilizing instructions. But a better method to follow is observing your plant for any signs that would indicate it is lacking nutrients.

Your plant might need fertilizer if it is not growing as fast as it should.  If you notice the growth of the plant is stunted and it is spring or summer you can safely add fertilizer in small amounts over a period of one to two weeks.  Many indoor gardeners will add fertilizer as part of routine maintenance each spring and that is fine too.  Just be careful not to over-fertilize.  Some signs that you have added to much fertilizer are the tip of the leaves are turning brown or the leaves are drooping downwards.

All fertilizers are not made the same; they are available in different ratios of nitrogen, phosphorous and potassium.  Purchase an organic fertilizer meant for indoor plants or one that is made for a specific type of plant. (Remember not to use chemical fertilizers on anything you will eat, or any plants that are indoors - you certainly don't want to bring toxic chemical fertilizers into your home.) You can also top-dress your indoor plants with compost (made via worm composting or traditional methods), but you may want to do this in the warmer part of the year, so you can set the plants outside while adding the compost, and not make a mess.


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