My in ground feed consist of grass feed 28-0-4. My soil is rich in P, very low in K and I need 0.0 P and a lot in K. I will foliage feed with Miracle Gro 24-8-16. Find out what your soils have. And feed from there.

I have been using Gro-Power (Citrus & Avocado flavor) at 50-75% of the recommended rate applied monthly beginning February. I add an identical amount of Amonium Sulphate and use the spike end of a crowbar to get the fertilizer down into the soil.

I had mediocre results until i started using the AS. I believe that the reason for that is the prior landscaping (huge redwoods, oleanders) depleted the soil of N. A heavy top dressing of compost improves the ground's moisture stability.

In the summer months when water is scarce, i liquid feed only; 1- 3 x a month.

Not surprising that the Ammonium sulfate worked well for you Molewacker. The one nutrient that CA soils are most often lacking is Nitrogen. I'm sure that the oleanders and redwoods took what was there, but there probably was not much there in the first place. Both of those are not heavy Nitrogen feeders, which is why they do so well in CA.

We mostly have a lack of Nitrogen because of our low rainfall rates. Rainfall is actually very high in Nitrogen, and in high rainfall areas, especially summer rainfall in areas that have thunderstorms, you will see a lot of Nitrogen in the soil. Plus there is also a lot more vegetation growing because of the rain, and if it's left to decompose in place, like in a fallow field, the Nitrogen increases.

But in low rainfall areas like ours, that happens at a much slower rate. That's why CA natives in general don't like High Nitrogen fertilizers, and can get by with no supplemental food. In fact they often die young when fed and watered at the "normal" rate.

Anyway, (sorry long post) as to Zwoydziak's question, since there is plenty of Phosphorus and Potassium in most CA soils, you can do fine with a fertilizer which is mostly Nitrogen.

For standard fertilizers that would be Ammonium Sulfate like Molewackers uses. The sulfate part is good for our soils as it adds acid, which CA soils in general also lack. The acidifying action unlocks many naturally occurring minerals in the soil. Do be careful with the amount though, Ammonium sulfate is good stuff but very strong. Carefully read the label and make sure you water before and after feeding, to avoid burning anything.

For organic that would be Blood Meal and Cottonseed Meal. Fairly inexpensive for organic and both high in Nitrogen. And the Cottonseed meal also can acidify the soil and is good for soil structure. Used together is really good.

Also read the label for the rates on Blood Meal, it also can burn, though less likely. Any High Nitrogen food can burn at a too high amount.

And of course, always water first and after any fertilizing you do.

Where do you all purchase Gro-power?

i call and order mine from the local Ewing Irrigation store; the AS is always in stock.