How often should I fertilize houseplants?

Question: 

How often should I fertilize houseplants?

Answer: 

Spring and summer and the best times to fertilize houseplants.  Fertilizers are available in liquid, crystalline, granular, spike, and tablet forms.   Utilize fertilizers specifically formulated for houseplants or use general complete and balanced fertilizers.  When using general, all-purpose fertilizers, mix them at half or quarter the strength outlined in the instructions because houseplants grow slower than the outdoor plants the instructions on the fertilizer label are written for.  When using fertilizers formulated for houseplants, mix at the concentration outlined on the label. 

The frequency of application depends upon the product and varies from every 2 weeks to once every 3 to 4 months.  Carefully read and follow label directions. 

Fertilize only when houseplants are actively growing.  Many have a period of rest – usually during the short days of winter – so no fertilizer is needed during this time. 

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