I was offered to share/buy a small quantity of those products from a fellow fruit trees grower near me. The N-P-K ration were the highest I have ever seen: 0-52-34 and 46-0-0.
I tried to find some info here but did not succeed. I google it and same results: not much info on which to make a judgment…
Anyone here tried those products before? Even though the recommended doses are small I just don’t want to over feed or worse kill my trees.
Thanks for any imput, information!
Marc
Mix them with water to dilute them down. Every fertilizer has a purpose. High nitrogen as an example we know is normally used for greens not fruit. We use nitrogen on hay fields as an example. Most fruit trees need no fertilizer at all or very little. Those fertilizer are not intended for fruit. Sometimes people add fertilizer like 10-10-10 if they have really poor soil and in very small quantities in early spring. Fireblight is much more active after fertilizer is applied. If someone gave me 0-52-34 and 46-0-0 then i would mix it with a large quantity of water.
For foliar spray: 1 level teaspoon Urea powder + 1/2 level teaspoon monopotassium phosphate per gallon of water. Do not mix in a closed container, but closed afterwards is ok.
Mix it up in 3 parts sand or peat or lime…and one part of each of your 2 fertilizers.
Then you’d have something similar to 10-10-10.
(11-13-9)
A handfull of that scattered on the ground per inch of tree diameter shouldn’t do any harm at all on apples or many other plants.
Pretty much…the combination as a percent of the total mixture of ingredients…rounded to whole numbers.
By volume or by weight?
I use both. I’m not organic. So I believe in using real-chemical-name ferts.
MKP is highly soluble. Lends itself to spraying, but also very hot stuff. Get an EC meter. Works out to a half-teaspoon per gallon or less.
Urea is cheap N. I mostly use it to break down a pile of wood chips into compost.
In fact it is hard to keep dry. The commercial ag suppliers I’m familiar with sell it in solution form by the pallet.
I bought 10 pounds of this stuff many years ago. I use it for foliage spread mostly, before bloom, after petals fall and fruits color up ,or rapid growth stages. I mixed 1 tsp per gallon which is about 0.1%. Sometimes up to 0.3%. It works very well to speed up flower buds appearance (therefore fruits). Way better than the five leafs pinch method on figs. I use it on grape to add more sugar in the grapes before harvesting.
Any plant that you want it to flower, you spread it. Some of my cactus have never bloomed, I spread it and manyhave the flower buds developing. It is a good stuff.
Isn’t the dry potassium phosphate more of a laboratory reagent not a fertilizer? I suppose it comes in various grades of purity. I’ve got a brown bottle of it that I haven’t used to 40 yrs that’s a laboratory reagent. I’m like Clark, not much fertilizer on my fruit trees. When I do it’s the cheaper grade fertilizer.
The P&K I bought is white crystal and sold as readily available fertilizer. It will absorb some moisture in the air but it doesn’t alter the chemical compound.
Well sure it’s a fertilizer. But you don’t need a 99.9% pure formulation as a fertilizer.
It is cheaper to buy the pure one and add water on your own. And it is easier to dilute to any percentage start from pure one
That’s not my experience, but I’m dealing with wholesale pricing.
The stuff is red hot as well. 1/2 teaspoon per gallon. Maybe a little less.
@kokopelli5A
The dosage I calculated years ago for aerial application to strawberries is 1/4 teaspoon per gallon.
Here is the calculation someone did:
1 gallon is 3.785 liter，1 liter water is 1000g，so 1 gallon water is 3785 g.
18 tsp P&K weight 100g，so 1tsp is about 5.6g.
5.6g of P&K in 3785 g water＝0.15% by weight
Different plants use different %. Also same plants in different growth stages use different%.
0.1~0.3% are used for foliage spray, seeding, transplant root dipping, also soak the seeds.
Yeah, it’s practically homeopathic In it’s dosage.
That four pound sack I bought will last me a very long time, even spraying every couple of weeks during growing season.
Probably it’s worthwhile to spring for one of those EC meters.