Well...a slightly high ph (over 7.2ish, I believe) or slightly low ph (6.2ish, I think, lol) can stress the roots, making nutrient uptake more difficult, as it tries to deal with the imbalance. (results in nute lock-out)

As time rolls on, the ph in peat based soil mixes tend to go south, but unless re-using your soil it should be ok for a season. I don't usually have problems, but I do flush regularly.
Rusty Trichome Reviewed by Rusty Trichome on . Little curly bushy plants need a little help :) Hi everyone . Here are my little ladies. Just now 5 days into 12/12 and for the past few days they've started to get really curly in the leaves and limp. Im a first time grower , and want to do all I can to let these little bushes reach their full potential. Thanks ! Rating: 5