I have one plant that is smaller than the others and it's turning yellow, starting at the bottom leaves and moving up. I'm working with an ebba nd flow hydro system and am flooding in ever 4 hours for 30mins. All my other info on the set up can be found here- http://megansgrowjournal.blogspot.com/ Please help
Whats your PH? yellowing is a trait of nitrogen deficiency. it would explain yellowing leaves and stunted growth. "Nitrogen Deficiencies: Plants will exhibit lack of vigor, slow growth and will be weak and stunted. Quality and yield will be significantly reduced. Older leaves become yellow (chlorotic) from lack of chlorophyll. Deficient plants will exhibit uniform light green to yellow on older leaves, these leaves may die and drop. Leaf margins will not curled up noticeably. Chlorosis will eventually spread throughout the plant. Stems, petioles and lower leaf surfaces may turn purple."-http://www.overgrow.com/growfaq/97 get a PH reader and find out your PH levels before you do anything. if PH is normal level ( about 5.7 for hydro)then you want to give it some nitrogen, this can be accomplished with urine or epsom salts. get a water bottle, like 1 liter, pee 1 inch into it, and fill the rest with water and do this once every 3 days untill things get better. sounds kinda gross and weird, but ive tried it and it works fine for me. http://www.overgrow.com/edge/showthread.php?t=537514 but be sure your PH is normal before u do this or it will go into 'lockout' where it wont absorb nutrients http://www.overgrow.com/growfaq/1080 Hydro can be pretty confusing if you dont know what your doing, like ive said to you before. When things get cloudy, read up! hope this helps someone, goodluck
I just went to the hydro store. I don't know why I just didn't go there first. They are super helpful and really hot. They sugessed me getting all new chemicals because of the age of mine. So I got what they said would be good. I changed out the water and redid everything. My water change out took less than 30 mins. BTW!
I have another one that's not looking so good. My biggest one- the bottom leaves are starting to curl under and spot yellow from the outside of the leaf in.