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Old June 6, 2018   #2
zipcode
Tomatovillian™
 
Join Date: Jun 2010
Location: Romania/Germany , z 4-6
Posts: 1,582
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7 is certainly not bad. Are you measuring the runoff or where? Try the runoff, if it's not doing well I'm guessing it's more around 8+. How well do you wish them to be exactly?
First, change the fertilizer. Second, use sulfuric acid ideally (if not, powder citric) to adjust water at each watering. What's your water source? Watering every time with proper pH water should keep the plants in ok state even if the longterm pH is much higher, the temporary lower pH will be enough to absorb those microelements.
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