Hello, i've never really looked at pH and nute-lock so i have a few questions.
My pH is 7! I no it should be around 6.2 - 6.5 a think, any ideas on lowering it?
What does nute lock look like? And how is it caused? How do you know when you have got nute-lock?
I've had a scan of the forums but can't seem to find anything conclusive really, thanks!
Here's a great tool for working on nute lock, though I admit that it sounds like if your plants are looking good then you're probably okay.
1) If the problem affects only the bottom or middle of the plant go to #2. b) If it affects only the top of the plant
or the growing tips, skip to #10. If the problem seems to affect the entire plant equally, skip to #6.
2) Leaves are a uniform yellow or light green; leaves die & drop; growth is slow. Leaf margins are not curled-up
noticeably. >> Nitrogen(N) deficiency. b) If not, go to #3.
3) Margins of the leaves are turned up, and the tips may be twisted. Leaves are yellowing (and may turn brown),
but the veins remain somewhat green. >> Magnesium (Mg) deficiency. b) If not, go to #4.
4) Leaves are browning or yellowing. Yellow, brown, or necrotic (dead) patches, especially around the edges of
the leaf, which may be curled. Plant may be too tall. >> Potassium (K) deficiency. b) If not, keep reading.
5) Leaves are dark green or red/purple. Stems and petioles may have purple & red on them. Leaves may turn
yellow or curl under. Leaf may drop easily. Growth may be slow and leaves may be small. >> Phosphorus(P)
deficiency. b) If not, go to #6.
6) Tips of leaves are yellow, brown, or dead. Plant otherwise looks healthy & green. Stems may be soft >> Overfertilization (especially N), over-watering, damaged roots, or insufficient soil aeration (use more sand or perlite.
Occasionally due to not enough N, P, or K. b) If not, go to #7.
7) Leaves are curled under like a ram's horn, and are dark green, gray, brown, or gold. >> Over-fertilization (too
much N). b) If not, go to #8
The plant is wilted, even though the soil is moist. >> Over-fertilization, soggy soil, damaged roots, disease;
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copper deficiency (very unlikely). b) If not, go to #9.
9) Plants won't flower, even though they get 12 hours of darkness for over 2 weeks. >> The night period is not
completely dark. Too much nitrogen. Too much pruning or cloning. b) If not, go to #10...
10) Leaves are yellow or white, but the veins are mostly green. >> Iron (Fe) deficiency. b) If not, go to #11.
11) Leaves are light green or yellow beginning at the base, while the leaf margins remain green. Necrotic spots
may be between veins. Leaves are not twisted. >> Manganese (Mn) deficiency. b) If not, #12.
12) Leaves are twisted. Otherwise, pretty much like #11. >> Zinc (Zn) deficiency. b) If not, #13.
13) Leaves twist, then turn brown or die. >> The lights are too close to the plant. Rarely, a Calcium (Ca) or
Boron (B) deficiency. b) If not
You may just have a weak plant.
