Is it necessary to fertilize annuals growing in containers?

Question: 

Is it necessary to fertilize annuals growing in containers?

Answer: 

Plants in containers need to be fertilized on a regular basis as nutrient levels in potting mixes quickly fall due to absorption by plants and leaching during watering.  

Many commercial potting mixes contain a slow release fertilizer.  However, slow release fertilizers seldom last the entire growing season.  When using a potting mix containing a slow release fertilizer, begin to fertilize plants when plant growth slows or the color of the foliage fades.  A granular fertilizer can be applied to the soil surface or plants may be fertilized with a water soluble fertilizer.  Check the product label for application rates and frequency.  
 

Category: 

Links to this article are strongly encouraged, and this article may be republished without further permission if published as written and if credit is given to the author, Horticulture and Home Pest News, and Iowa State University Extension and Outreach. If this article is to be used in any other manner, permission from the author is required. This article was originally published on . The information contained within may not be the most current and accurate depending on when it is accessed.