Understanding Fertilizer: Water-Soluble V.S. Granular Slow-Release 

As you plan your fertilizer program for your greenhouse or outdoor crops, you’ll want to know the difference between water-soluble and granular slow-release fertilizers.
There are advantages and disadvantages to each. And which you choose will depend on the needs of your soil and plants throughout the growing season. You may choose to keep both for use on different plants or at different times.
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