Not used the Masterblend and wouldn't use it if they gave it to me. Mike at HG, who I've talked with at length about using his product, formulated 4-18-38 through years of working with professional growers. Morgan County copied it and markets it cheaper without knowing diddly about usage or the work of years coming up with those ratios and quantities of mag and calcium to make a balanced formula.
I wouldn't bother with the Osmocote if your using the 4-18-38.
Also keep in mind, the Chemgro 4-18-38 is meant to be used in a highly porous media of peat/perlite or coir/perlite in pots or bags, and not in-ground or with soil amendments like compost or manure. Not saying it won't work to some degree or another, but not what is recommended.
Last edited by Ricky Shaw; March 13, 2018 at 07:02 AM.
|