Leaves turning yellow, dying from the bottom up (pix included)

[andyob99]

hi havin same kinda problems with my grow wonder if someone could help by checking out my thread thanks

[jbuggie]

Leaf tip burn isn't usually caused by heat. It's too much nitrogen. The yellowing that shows on the upper leaves is mimics overfert but it's actually the same yellowing that is down below. In time, the rest of the leaves will turn yellow. If the leaf tips turn yellow, then brown, that's overfert. Let us know what happens after some dynagrow.

Yo polishpollack; have you ever used cal meg for the calcium problem?

[guywithsmie]

Attachment 286743Attachment 286744Attachment 286745Attachment 286746

Also having an issue with leaves turning yellow. These are about 3 weeks old. I am waterting every 4 or 5 days. They are located in a growing closet, with a fan and 180 watt LED grow light, which is about 6" above the plants. I applied a water soluable 20-20-20 plant food a week ago per manufacturer's direction.

Any ideas?

[B-LO]

As polishpollack said , you have a nitrogen, phosphorus, potassium, and magnesium deficiency 25% likely A nitrogen deficency results in pale plants, red stems and stunted growth. Rapid yellowing of leafs running up the plant is another sign. and magnesium is another big one lower leaves turn yellow and may turn white while veins remain dark green. Blades die and curl upwards. add some nutes to solve. plants should recover within a week.

[Thoth]

Personally don't think there's anything wrong with the OPs girls.

Leaves aren't meant to stay green through th flowering cycle, if you have all green fan leaves all through flowering then you're clearly feeding them too much, you want the fan leaves to turn yellow and fall off during the flowering phase.

[Sunrise2006xxx]

Personally don't think there's anything wrong with the OPs girls.

Leaves aren't meant to stay green through th flowering cycle, if you have all green fan leaves all through flowering then you're clearly feeding them too much, you want the fan leaves to turn yellow and fall off during the flowering phase.

Quick question, do you pick the yellow leaves or leave it until it falls off by it self?

[pohas9]

Next time you grow add worm castings about some 6 or more hanfulls of worm castings to a 3galons of soil. Worm castings can solve many problems, It stabilize the nutrients in soils, and worm castings by them selves is a light nutrient, Marijuana plant takes all nutrients from it pretty fast, that's why you has to add much of it, but don't overdose. Most of worm castings ph is 8, but that ain't so bad, if soils ph is 6. This year I grow outdoor again, and to a fev buckets I added the worm castings, those plants are healthy, green, not any problem, even the old leafs, that has to die is half dead, but still green (except Powdery Mildew <-it causes the heat and high humidity, but that ain't that bad, cause I'ill put those plants in H2O2 right before trimming) Other plants, that hasn't those worm shit, now is in a poor condition, most of the leafs are yellow, rest of the leafs are light green. To a plants I add a rain water with organic nutrients ( rain water was clean), so I guess the worm castings has pretty much nitrogen too.