ICL Professional Horticulture Technical Manager Andrew Wilson explains what water soluble fertilisers are and how they can be applied directly to the plant through drip irrigation and foliar application. 

He explains how to apply them through a diluter, overhead irrigation or drip irrigation. WSF’s are usually applied as a supplementary feed in combination with a Controlled Release Fertiliser such as Osmocote 5. They are typically used to give a growth boost to outdoor crops after a prolonged high rainfall period during the growing season.

Wilson talks about different types of water soluble fertilisers to suit your water type and ratios of NPK in the product, as well as conductivity (EC) of the fertiliser.

He explains how AngelaWeb 3.0 software takes many nursery specific factors into account such as water quality, growing media and Osmocote levels and says how WSF’s can be used in peat-free growing with care and tells us about frequency of feeding 

Lots of advice can be found on the ICL website and many practical videos on our Youtube channel ICL UK/Ire Professional Horticulture.

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