Foliar Feeding Plants
22.01.2024 - 21:21
/ backyardgardener.com
/ Frederick Leeth
This is the application of nutrients to the aerial parts of plants. It can be used for the treatment of all deficiencies for all types of growing plants. But you can only spray very small amounts of nutrients onto the leaves at a time, otherwise, leaf scorch or even defoliation may follow. If foliar spraying is to be successful there must be sufficient foliage to hold the applied nutrients, and plants cannot develop to a stage of growth when foliar treatment, would be effective unless the soil has been prepared properly before sowing or planting. So, although foliar feeding cannot take the place of the traditional method of applying fertilizers and manures to the soil, it is a useful supplement, for the following purposes:
Foliar applications of potassium nitrate to roses have often produced more richly colored blooms and dark green glossy foliage.
Nutrients can be applied as dusts or sprays. Finely ground fertilizers may be dusted onto damp foliage but these are not as efficient as sprays because more of the fertilizer falls off the leaves and about twice as much fertilizer is required to give as good an effect as a spray.
So it is best to use sprays, especially when applying trace element fertilizers, which are required in very small amounts. The fertilizers listed in the table below are applied at the rate suggested, using an ordinary garden sprayer or a watering can with a fine rose.
If deficiency symptoms have occurred at an early stage spraying should be done immediately there is enough leaf to spray, followed by a further application in 2-3 weeks since most of the first application will have fallen on bare ground.
Where a deficiency occurs every year it is best to apply the foliar spray before symptoms appear.
Always
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