The availability of nutritional elements, particularly nitrogen, influences the development of weeds and unwanted grasses.
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_________________________________________________________________ Weed population in the lawn can be controlled by regulating nitrogen availability. ______________________________________________________________ |
Controlled-release nitrogen fertilizers help avoiding nitrogen surplus,
thus controlling the germination and development of weeds.
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Late in Fall Readily-available nitrogen stimulates germination and the proliferation of annual plants which are hard to control with herbicides, namely Poa Annua and Poa Trivialis. |
| End of Winter In February-March, Poa Annua consumes higher rates of nitrogen than the cold season grasses. As excessive nitrogen gives rise to the germination of the Poa Annua, it should be avoided. |
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Late Spring Readily-available nitrogen stimulates the germination and the growth of the summer grasses (Setaria, Digitaria, Echinochloa, Eleusine, Cynodon). |