Help! week five starting to yellow

[stinkyattic]

Not enough lime? That explains your pH drop. Peat has a natural pH around 5. Most soils and soilless mixes from the store are mostly peat. Therefore, lime in a bed grow is important.

[hydrocannabis]

woo hoo I just learned a bunch of great stuff from reeding this thread.
so thanks a lot.:thumbsup:

[crudvapors]

Your leaves are the poster child for phosphorus deficiency during the flowering stages. I think i'm having that same problem but in the veging. I think my nutrients are a little lacking.

"Solution to fixing a Phosphorus deficiency
Some deficiency during flowering is normal, but too much shouldn't be tolerated. Any chemical or organic fertilizers that have Phosphorus in them will fix a Phosphorus deficiency. If you have a phosphorus deficiency you should use any N-P-K ratio that is over 5.Again Peters all purpose 20-20-20 is a good mix. Miracle grow Tomato plant food, Miracle grow All purpose plant food (Only mixing at ½ strength when using chemical nutrients, or it will cause nutrient burn!) Other forms of phosphorus supplements are: Bone meal, which is gradual absorption, I suggest making it into a tea for faster use, where bone/blood meal is slow acting, but when made into a tea it works quicker! Fruit eating bat guano, which is fast absorption, Worm castings, which is gradual absorption, Fish meal, which is medium absorption, Soft Rock Phosphate, which is medium absorption, Jamaican or Indonesian Guano, which is fast absorption. Crabshell, which is slow absorption. Tiger Bloom , which is fast absorption."

[stinkyattic]

There's a serious difference between a straight deficiency and a P lockout due to pH imbalance... his is the latter... a poster child for it.