16-16-16 Fertilizer #552975 - Ask Extension


16-16-16 Fertilizer #552975

Asked April 13, 2019, 9:49 AM EDT

I got some 16-16-16 fertilizer for my plants, but there are no directions telling me how much to use. I have perennials, boxwood, Eternal Fragrance daphne, apple trees, hebe, astilbe - a whole variety of plants to fertilize. Is there a general rule as to how much to use. Thank you. Lynn

Washington County Oregon

Expert Response

How did you obtain this fertilizer?  Was it from a friend, or was it removed from the original packaging?  Ideally you should find out the brand and then look up the product details on the internet to find the directions.  It's likely the fertilizer should be dissolved in water and then applied to your plants.  In general, you do not want to fertilize plants until there is enough leaf growth to indicate the plant is actively growing.  For most of these types of 'balanced' fertilizer, what I do is dissolve a tablespoon in a gallon of water and then take that solution and take a quart (1/4 of a gallon) and dilute that up to a gallon and then water with that solution.

If this is a granular fertilizer, then using no more than one or two tablespoons per plant and scratching that in around the drip line of the plants and then water thoroughly.  In both cases I would be very conservative in applying the product to any plant since I don't have the original packaging.  In the future you may want to avoid the practice.
Sara Running Replied April 16, 2019, 5:33 PM EDT

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