Laughing Buddha - Yellowing new growth - Pics

[RedEyeJedi01]

Currently growing Laughing Buddha, sativa dominant, in 7 gallon oxy pots in soilless promix HP. Using Advanced Nutrients Sensi PH Perfect full line up per their nutrient schedule, currently 4 weeks into veg feeding Sensi Grow A&B, B52 and all the bennies.

She's been having an issue with new growth yellowing and I can't really pinpoint it, initially thought it might've been sulfur or iron deficiency, but wanted to get other opinions. Didn't think it'd be likely considering it's supposed to have all the macro and micro nutrients in the A&B formula, but I dunno

Right now, she gets fed once a week with about three gallons and then just plain, PH'd water in between, three gallons. Growing under a 1000w LED lamp, temps about 81-85 with added CO2 (in the form of three naturally-occurring CO2 bags from Sierra Natural Sciences) and lots of fans/circulation.

Any thoughts? These pictures were taken between yesterday and today. Please help!

 

[Preachforcure]

Possibly Iron...It’s somewhat common for marijuana plants to experience an iron deficiency. It will affect new growth in the plant, including leaves. For the most part, upper leaves will be affected, and you’ll start to notice a distinct yellowing in those leaves. The veins will stay green, but the leaves themselves will not have the right amount of chlorophyll. In fact, iron plays a large part in the creation of chlorophyll in the marijuana plant.

An iron deficiency can look a lot like a magnesium deficiency, except that iron only effects new growth. So, the issues will take place only in the top leaves and not the lower- to midrange leaves. Iron deficiencies generally occur in tandem with an imbalanced pH level, so you need to adjust for that when you treat the deficiency. It can also occur simultaneously with zinc and manganese deficiencies.

A magnesium deficiency is rare when you’re growing marijuana outside, but it can happen in indoor soil and soilless mediums. It primarily affects the lower leaves of the plant at first, turning them yellow and making them lose vigor. Eventually, these leaves will die. The deficiency will work its way up to the middle and then the top layer of leaves. The element is a major factor in the production of chlorophyll in the plant and it’s important to infuse your marijuana plant with magnesium if it exhibits these symptoms.

Epsom salts are the quickest and easiest way to treat a magnesium deficiency. It’s also important to distinguish between a magnesium deficiency and iron deficiency so that you don’t end up over-fertilizing the plants.

 

[Preachforcure]

here is a good read on fixing an Iron Deficiency...

grow weed easy .com /iron-deficiency-cannabis