

I suspect a ph problem but have no means of measuring.
The soil is with compost and synthetic fertilizer, some sand and a little perlite. It's PH is listed at 5.8 and i have not added anything but water.
I have been watering with tap water and melted snow.
I guess the soil might be getting too acidic?
Any advice on diagnosing and fixing is aporeciated.
As it is now i am considering adding some baking soda with water next time.
The pots are ~ 0.7g and i was thinking of trying 1/4 teaspoon of the soda with each watering.
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