I am also exploring an increase (and variation) in various nutrients. So much is uncertain and I am hedging on everything. Controversial like many things, I am adjusting the pH of my solutions. I decided to target about 6.0 for solutions that go primarily to the root zone. For solutions that might have foliar absorption, I am targeting about 6.5. Most of the time I just adjust the proportion of RO and tap water I use to achieve the goal. For a few solutions I must use a pH lowering product. I don’t have enough time left as a grower to try things one at a time. I have to put all my chips into the center of the table.Thanks guys, I’ve tried most of these things. I’ve watered with Epsom salts once and used it in the foliar spray. Maybe it takes some time to show. I’ve also moved the plants back from the window as it’s getting sunnier. There has been some very slight fading on the odd leaf close to the window.
The plants don’t get very warm. We live on the SW tip of England in an extreme maritime climate. It rarely gets into the mid twenties centigrade here in summer, the effect of the sea and prevailing SW wind all the way across the Atlantic is so strong. Plus when it’s sunny, the windows above the plants are open and letting in cooler air.