How much epsom salts for magnesium deficiency with blueberries?
I did a soil test recently for 30 blueberry bushes in a 25 x 50 foot bed. Magnesium was quite low and they suggested 1270 lbs/acre of Epsom Salts so 35 lbs of Epsom Salts for this smaller area. Somehow that seems like a lot to spread all at once? Older postings talk about 1/4 cup per plant or a few tablespoons mixed with water. What do people suggest?
Soil test said:
pH: 4.2 (a little too much sulfur last year I guess)
Plant Nutrient Needs:
Phosphate 50 lb/A
Potash 110 lb/A
Magnesium 140 lb/A (or 1270 of Epsom Salts, 280 of Magox)
The majority of these plants were bare root planted last year and are doing okay. Some new growth last year with some holly tone early last year and one dose of Miracid last summer. This year they have had one dose of Miracid about a month ago which was after the soil test.
I'm planning two more doses of Miracid (soon and in a month) and the Epsom Salts and maybe some greensand to help with the potash deficiency.