yellowing leaves during flowering,help!plz

[smokybear]

i dont know what im doing wrong here,but the plant is curling and leaves are yellowing and dying here is a pic to help better troubleshoot, hope u help me out

smokybear Reviewed by smokybear on 12-22-2006. yellowing leaves during flowering,help!plz i dont know what im doing wrong here,but the plant is curling and leaves are yellowing and dying here is a pic to help better troubleshoot, hope u help me out Rating: 5

[Perp]

Have you checked your your temps, PH, nute levels? If not then make sure they are all ok.

If everythings good there, click on the plant problems guide in my sig. Scroll down a bit till you get to potassium. Do your leaves look like that?

[smokybear]

Have you checked your your temps, PH, nute levels? If not then make sure they are all ok.

If everythings good there, click on the plant problems guide in my sig. Scroll down a bit till you get to potassium. Do your leaves look like that?

thanks for the quick reply frist off i must say i have a cheap probe for checking nute and ph,its a ferrymorris brand it was all i can afford at the moment but,ph is bettwen 6.8-6.5 nutes i dont know.i have ff big grow and tiger bloom also i add some mg 15/30/15 cause i thought the 2/8/4 tiger blooms didnt have enough Nto sustain the plant during the entire flowering cycle,hmmm the temps are at 80/86 when light are on and 62/65 when off i hope that helps

[Perp]

You may have over fed them. Do a good flush with plain, PH'd water and wait a couple of days before feeding them again.

Did you look at the link? Read up about potassium. (Emphasis mine)

Having to little of Potassium in your plants causes the plants leaves to show retarded growth and show a scorched tip and edges around the leaves. Plants may stretch and your branches can be easily broken or weak. Donâ??t get this deficiency confused with iron, because it almost acts like iron but to tell the difference in the two is: for potassium the tips of the leaves curl and the edges burn and die. Older leaves may show a red color and leaves could curl upwards. Dead patches (Necrosis) can happen on the margins of larger fan leaves thus, the leaves will eventually die off and turn brown. The Older leaves will show different patches of color (mottle) and turn yellow between the veins, following by whole leaves that turn dark yellow and die. The plants overall growth slows down, mostly when they are in vegetative stage. To little amount of potassium also slows the growth of buds during flowering stages. Dark edges will appear around the edges of the leaf when the deficiency is starting to happen. When your Relative humidity is low, you can almost bet your going to soon get a potassium deficiency from your plants perspiration.
Potassium can get poorly absorbed when having too much Calcium or ammonium nitrogen, and maybe cold weather. Having to much sodium (Na) causes potassium to be displaced. SO keep those in mindâ?¦ Parts affected by a Potassium Deficiency are: older leaves and leaf margins.

Does this sound like your plant?

[harris7]

try posting a picture that wasn't taken under the HPS light, it changes the colour so much it's hard to tell whats going on.

[smokybear]

try posting a picture that wasn't taken under the HPS light, it changes the colour so much it's hard to tell whats going on.

i will do that when the lights are back on