ok heres what you do. mix baking soda and vinegar will produce sodium acetate, after you do this pour out the water(vinegar left over from the solution) now mix the remaing sodium salt( the baking soda) with 3 tbsps of vinegar. you have now created a buffer of sodium acetate. buffers keep ph in a stable range in this case around 4-6. now we need to raise that potential up slightly take your buffer mixture and add it to a one gallon container, now add 2 tbsps baking soda to the container as well as water. water both of your plants with this slowly. the ph shoudl be between 5.5-6.7 and adding this to your soil slowly will help keep the ph in that range . you want to add this slowly so it stays on top as long as possible. you want to saturate the top 2 inches of soil with this, wait till it dries and repeat. do this once per grow and you should have a more stable ph range.
