For those of you having difficulty locating my previous posts on my potting mix and fertilizer formulas, here they are again.
Thank you for all the time you have put into this! I am a new gardener and would like to try your formula. Where do you buy all this?
not sure what all of this is but I am going to try it! Thanks again.
"Here are my recent soil test results so that you can get a better picture of what is needed for a 2+ cu. ft. planter like the EB. This is not complicated, but there is some valuable info. and insight into what to expect from fertilizers.
My home made 'Basic' fert. tests N3.8%, P4.2%, K4.0%, and contains:
```1 part Rock Phosphate
```1 part Bat Guano
```2 parts Dried Blood
```5 parts Greensand/Gluconate Potash
My home made potting mix contains NO nutrients of any kind - not even a Ph adjustment of carbonate of any kind, and tests PH 5.5, needing N=100%, P=100%, K=100%.
To 2+ cu. ft. of my home made potting mix, I add:
3C Worm Castings
1/4C 'Basic' Fert.
1/8C each of the following:
```Azomite (trace minerals), Gaia Green (Glacial rock dust containing trace minerals and available calcium, iron, magnesium, potassium and micronutrients), K-Mag (Potassium 22%, Magnesium 11%, Sulfur 22%, does not change Ph), Calc-M (calcium 23%, sulfur 18%, does not change Ph).
Addendum: I am now using the above amounts with one (1) cu. ft. of potting mix, or twice the amount for the 2 cu ft. EB.
To adjust Ph to various plant's needs, added:
for Ph 5.0-5.5 (Potatoes) No added carbonates of any kind.
for Ph 6.0 (Strawberries, etc.) 1/8C Oyster Shell OR 1/4C Dolomite Limestone
for Ph 6.5 (Nearly everything else) 1/4C Oyster Shell OR 1/2C Dolomite Limestone
After 'aging' the mixed, fertilized potting mix for two weeks, the soil tested as needing N4%, P4%, K4%, exactly what my 'Basic' fert. provides. (Note: No nutrient shortage with the above doubled fert. application) However, I only used 2 cups of the 'Basic' fert. in the strip as my experience tells me that more would only be wasteful. (Note: Only one (1) Cup needed in center strip) I may try an experiment next year with a heavy feeder like Tomatoes if I use two EBs, one with 2C fert. and the other with 3C fert. - but now I don't see it being needed.
As you can see, you don't need high fert. numbers OR high quantities to get good crops. However, I personally see a cautionary note about the amount/quantity of Dolomite Limestone being recommended for EB use. In the 2+ cu. ft. volume of the EB, I personally have seen 1/2C Dolomite adjust the PH one full number alkaline. And if people are starting out with potting mix already PH adjusted to ~6.5, then 2C dolomite should take the PH way too alkaline, even for tomatoes. When you get the Ph over 7.5, you get nutrient lockup, disease and insect intolarance. Someone else should really look into this, as I think there may be a potential problem here.
"I posted info. on my home made potting mix, but here it is: Premix equal parts Sphagnum and Coconut Husk Peat. To 7 parts 50/50 peat, add 2 parts Vermiculite, 1 part Perlite and 1 part 4X8AWC Coconut Shell Activitated Carbon (particle size of 1/4" to 1/8", acid washed for Ph neutrality and dust removal). For the Activated Acid Washed Carbon, check on the net with Pool Filter supply companies. It is usually available in 50 lb. bags and for about $60.
Addendum: I am now using only one (1) part Vermiculite and 1/2 part Perlite in my current potting mix.
This potting mix has the best texture and "hand" that I have ever felt, and was worth the time and effort put into making it, and it wicks beautifully."
I have not found a product on the market (except perhaps what I remember of the old 'Black Magic' for African Violets) that has this feel and fluffyness. I highly recommend it to those looking for a home made potting mix.