Are organic fertilizers better than conventional fertilizers?
Whether a fertilizer is organic or synthetic, after applied to the lawn it must convert to a form the plant can use. Once converted, the plant does not know the difference as to the nitrogen source. One of the advantages associated with organic sources is low chance of burning grass. Some synthetic fast-release sources have high salt levels that increase the chances of burning. On the other hand, most synthetic controlled-release sources are very unlikely to burn grass. A drawback of many organic nitrogen sources is the percent nitrogen is quite low, meaning it takes considerable material to be spread over the lawn to give the proper rate of nitrogen. Some materials, such as compost, are best used as a soil conditioner to improve soil quality, rather than to supply nutrients. Furthermore, most organic and some synthetic fertilizer sources rely on soil microbes to break them down to release nitrogen, so they do not work when soils are cold. So as you can see, there are tradeoffs to cons
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