Your two easiest, least expensive mineral sources are....
Azomite to mix in with dry fertilizer.
https://azomite.com
It's a clay from a former seabed in Utah and has almost every mineral known to man.
I use it in the Complete Organic Fertilizer mix Steve solomon came up with.
here's that:
- COF or Complete Organic Fertilizer -
-
enough to cover 100 sq. ft. -
- mix by pouring from one 5 gallon
bucket to another -
3 quarts of cottonseed meal
- can order it from
feed store by 50# bag, any seed meal will work -
1 quart bone meal
- can also use colloidal rock phosphate - feed store may be able to get bone meal, lowes or home depot probably have the rock phosphate fertilizer, maybe even the bone meal
1 pint Azomite
- probably easiest to get this from amazon - can substitute kelp but kelp is incredibly expensive now.
1 pint dolomitic (part lime, part magnesium) limestone plus...
1 pint agricultural gypsum
- can get both of these at lowes or home depot -
- If using to fertilize acid loving plants like blueberry and potato make a special mix with no lime
1/3 cup potassium sulfate
- Lowes or Home Depot may have this, if not, get it
online -
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One more thing about Azomite. The
native folks would travel hundreds of miles way back when to get this stuff to use on skin problems. Smearing a mud of this and some
water on almost any skin problems does amazing things.
there's a lot of info out there on clay therapy and drawing clay if you want to take a deeper dive on this.
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For liquid and dry fertilizer Sea 90 will do it big time.
It's sea salt.
Details here:
https://www.sea-90.com
Yeah, I know, "Salt on my plants? No way!"
That was my initial reaction too, until our very own Mr. Redhawk here (soil scientist) convinced me to try it.
Spectacular, highly visible results is all I can say.
This probably outranks Azomite for me because it can be used as dry, liquid, or foliar feed and seems to get quicker, more dramatic results.
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I use them in tandem in case for some reason I can't get to the foliar feeding every couple weeks, the Azomite has it covered.