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Jan 18, 2004

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Health & Wellness

Plants & Animals

Fertilizing accurately using PPM

Fertilizing is one of the most critical factors in successful seed starting. Even so, most home growers are resorting to very general guidelines, such as “use a 1/4 strength fertilizer”. Some plants consume more fertilizer than others and the concentration of various fertilizers can also vary so how do you differentiate between plants which require more fertilizer, or less? and how much more fertilizer does petunias require compared to pelargonium, and to impatiens? To get around this problem the greenhouse industry has established a universal measurement commonly referred to as PPM: "Parts Per Million". By using this measurement we can move on from the imprecise guidelines and vastly improve the quality and performance of our bedding plants. But we do not have to calculate in millions. In fact, in this article you will learn to dose fertilizer precisely in teaspoons, gallons, even scoops and tanks, if you like. The methods are all the same and are based on the PPM principle. Do you know your PPM ?

By: Kenneth Joergensen

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