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Old 05-18-2011, 12:01 PM
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Is it safe to use triple 13s (13-13-13 N-P-K) on vegetables & tomatoes for consumptions? I bought them in feed store and it is "generic" triple-13s.
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Old 05-18-2011, 01:28 PM
Location: Tampa Bay Area
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It sounds a bit high to me. Just try to use it cautiously (little less amount spread out). I use 6 6 6 to toss about with reckless abandon.

5 10 10 and 10 10 10 are a bit more recommended I beleive.
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Old 05-18-2011, 01:43 PM
Location: Maine
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What does the label say?
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Old 05-18-2011, 02:29 PM
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Generally speaking an average garden will need a 1:1:1 fertilizer so so far the numbers aren't "bad" but without a soil test to see if you already have too much or to little of one or another of the many needed nutrients no one can say for sure that it is alright. The pH level of your soil can make a difference as well. While not the strongest fertilizer with numbers like that you will also need to apply it less generously than a 10:10:10 or 8:8:8 fertilizer per square foot or run the risk of burning the plants.There should be directions on how much to apply to how much ground so that you don't over concentrate.

Here is a basic explanation of what those numbers mean and how they might relate to your garden.

Understand Fertilizer Numbers - Lawns | Lawn & Garden | LSU AgCenter

This site is excellent for the general veggie garden:
Home Vegetable Gardening

I've never heard of a "triple s" fertilizer but suspect the 13-13-13 is more likely something to be used on lawns and tree applications from the following ad: 13-13-13 Fertilizer, 40 lb. - 6806284 | Tractor Supply Company
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Old 05-18-2011, 05:02 PM
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Triple thirteen is a standard plant food fert. Its fine for veggies. Just work into ground around plants and water throughly. I prefer you use organic compost for fertilizing veggies but the bagged stuff will work. I only use it on ornamentals, trees and lawns when needed.
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