NOTE: I HAVE ADJUSTED THE DAY COUNT TO REFLECT DAYS SINCE SPROUTING IN THE ROCKWOOL


4/9/2011 Seedling day 7:


All plants except for plant A are a healthy green color. Plant A has slight yellowing on the tips of its first set of leaves above the seed leaves. Temp. 78 Deg. F. Humidity 62%. Soil feels dry approximately 1 inch down, and slightly damp below that. Watered all plants with 1 cup of water+superthrive mixed at a ratio of 2 drops per gallon, and testing slightly above ph6.5. I waited about 10 minutes, then came back and still no runoff, so gave each plant between ¼ to 1/3 cup more, poured slowly until just a few drops of runoff appeared. Tested Runoff gave me a reading of ph 6.


Question of the day:


I am concerned about the validity of my runoff test. What is the best way to test runoff in a soil grow, using paper strips or drop test? What is an acceptable range for ph of runoff?