OldManRiver
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I have some seedlings that have been struggling. The soil, Happy Frog, has a pH of about seven, as measured by a HomeDepot gauge. Before you diss that, I have used these for some years for soil, and they are close enough for government work; the soil pH is higher than optimum. I watered in aluminum sulphate twice, but the pH is being very resistant. In trying to lower the pH, I have overwatered the plants, and they are hurting. I think they will come back, but I'm looking for advice on how best to nurse them. They are 6 inches tall, on their four or fifth set of leaves, bottom two sets are toast. They are in 16 ounce solo cups, several drainage holes each. At this point, I'm watering them a measured 1/4 cup every three days, when soil is dry three inches down. The last watering, I gave a teaspoon of Alaska fish ferts in a gallon mix. They got 1/4 cup of that mix. The overwatering was almost three weeks ago now, and now they are just stalled. They have looked like that for over a week, except that the lower leaves originally weren't dead. LOL. They are NOT clawed down; the remaining leaves are flat or praying up like the should be, and color is OK. Not great, but OK. Lights are HLG 240W quantum boards, 26 inches up. One is a 3000K, the other a 4000k. Both are at or near full output. I have tomatoes, basil and peppers in the same soil, under the same lights, and they are mostly doing just fine. All plants have had the same water regimine, some of the tomatoes had some overwatering damage, too, but they are all recovering. Room temp is 65 at night, up to 72-3 in the day. They are on a seedling mat that is set to 77*. RH is about 50-60 percent, depending on the day.
I really want to get the pH down 1/2 point, but I can't do that without watering heavily, and you can see what that did.
Thoughts?
I really want to get the pH down 1/2 point, but I can't do that without watering heavily, and you can see what that did.
Thoughts?
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