How often should potassium dihydrogen phosphate be sprayed (how long does it take for potassium dihydrogen phosphate to take effect after application)

Why are fake potassium dihydrogen phosphate products rampant? Because it is expensive and driven by profit.

Potassium dihydrogen phosphate is a binary compound fertilizer containing phosphorus and potassium, but its content is high and its price is several or even dozens of times that of similar compound fertilizers, so it is favored by criminals, resulting in the rampant spread of counterfeit potassium dihydrogen phosphate.

Some use potassium chloride, some use potassium phosphate, and some even use table salt. If you buy "potassium dihydrogen phosphate" containing table salt, the harm will be great.

Genuine potassium dihydrogen phosphate is a "three-no" product, that is, it is non-toxic, harmless, and residue-free. It has many benefits, such as promoting growth, making roots thick and stems tough, increasing fruiting rate, resisting lodging and increasing yields, etc., but its main function is to promote flowering and fruiting.

In addition, potassium dihydrogen phosphate is relatively expensive, so it is generally not used for soil application, but is mostly used for foliar spraying, seed mixing, and seed soaking. Of course, root irrigation and flushing are also possible, and no one objects.

Based on the effects of potassium dihydrogen phosphate on promoting flowering and fruiting, strengthening roots and stems, resisting stress and improving quality, it is said that:

First, potassium dihydrogen phosphate can be used before and after the flowering period of crops to promote flowering and increase fruit setting rate.

Second, it is used in the middle and late stages of crop growth and development, when the root system is getting old, the teeth are not good, and the digestive ability is poor. The purpose of spraying potassium dihydrogen phosphate on the leaves is to strengthen the roots and stems, resist cold, drought, diseases and pests, resist lodging, increase yield and improve fruit quality .

So, how often should potassium dihydrogen phosphate be used and how many times is best ?

Some people say to use it once every 10 days or half a month, some say to use it once on the 20th day of half a month, and some say to use it once every 5-6 days. I say: it is better to use it once every 7-8 days.

Potassium dihydrogen phosphate is a fast-acting fertilizer. It is applied in very small amounts and is applied on the leaves. Although the absorption rate is high, the utilization rate is also high and fast. In addition, due to exposure to the air, the loss rate is also high.

Therefore, in order to prevent the gap between the old and the new, I suggest you spray it once every 7-8 days, and not too many times.

Usually, spray 1-2 times before and after flowering, with a concentration of 0.1%-0.3%. Spray 2-3 times in the middle and late stages of growth and development, and the concentration can be slightly higher, at 0.2%-0.3%.

Spray potassium dihydrogen phosphate on the leaves twice in a row, preferably with an interval of 7-8 days.

When using potassium dihydrogen phosphate as foliar fertilizer, the rules for using foliar fertilizer should be followed, such as not using it under the scorching sun, not using it excessively, not using it frequently, etc.

Moreover, potassium dihydrogen phosphate should not be mixed with alkaline substances such as wood ash, calcium magnesium phosphate fertilizer, kiln ash fertilizer, etc. It can be mixed with nitrogen fertilizers such as urea to enhance its effectiveness. It can be mixed with other micro-fertilizers, fertilizers or pesticides to achieve multiple effects with one spray.

However, it is important to understand the acidity and alkalinity of fertilizers and pesticides to prevent chemical reactions that may reduce fertilizer or pesticide efficiency or even cause damage.

Finally, let me say a few more words. You can lick, smell and heat potassium dihydrogen phosphate to distinguish the authenticity. If you heat potassium dihydrogen phosphate on an iron sheet, the fertilizer will dissolve into a transparent liquid, and solidify into a translucent glass-like substance after cooling. That is potassium metaphosphate, not potassium dihydrogen phosphate.