Are you sure it's a problem due to pH lockout? How old are your seedlings? Have you begun to fertilize them? If you're pH is not so far in either direction to cause harm to the plant, it's probably not lockout. If the seedling is still feeding from the cotyledons, then the pH is not as important. pH is primarily important for the plants to properly take in nutrients. If they don't need the nutes, it won't matter.
gainesvillegreen Reviewed by gainesvillegreen on . PH won't go down??? Ok so my seedlings have PH lock out at the moment and its because the PH is obscenly high, something like 8.5+ and I have NO CLUE how it got that way. I've been flushing them for the last half hour or so and the ph just won't drop, and I have no clue why. They are in a manure/perlite mixture and I've been flushing with water ph'd around 6.8, anyone have any idea as to why the PH is staying constant at such a high? I've probably run nearly half a gallon through each of them already and they Rating: 5