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Is this really something i need to sort out? I am still battling with temps, but i'm losing faith that this is temperature related. I fed one of them yesterday with 1 teaspoon of epsom salts in 3 liters of water along with the flower nutes (first time using them). Today the yellowing on it...

Cheers for checking that. Is that in liquid form? What was the before (before as in, nutes but no ES) and after ppm? Also you say 1 - 3 tsp, how many did you add exactly?

Maybe i was just adding too much. I'm growing in soil too by the way and my normal nute feed is about 800-1000ppm, it raised it to about 1800. Like i said - i guess i just put too much in...

Adding one teaspoon of epsom salts to 3 liters raises my ppm quite a bit. Is it ok to rise much higher than your normal ppm with epsom salts if you're correcting a deficiency? I'm adding the salts with my normal fert mix because i have large pots and they only get watered once every 4 or 5 days.

The fert im using has 0.01% magnesium as sulphate and 0.008% as EDTA chelate. Im wondering if thats too low...

That doesn't mean that this isn't a problem. If i left things as they are, i would still have no problem finishing the flowering phase. However, this is not normal and it will have a negative effect on the results - by how much is anyones guess, but i'm a perfectionist. I'll be starting...

That page is great. Looking at that it may indeed be a sulphur deficiency... Has it helped with the problem? I'll give it a go tomorrow and report back in a day or two.

I cant type much on my phone but what kind of ph down do you use? Look up potassium deficiency you may have that. Would make sense if your still using that fert with huge amounts of phosphorus. I would never use a flowering fert with more P than K. Also yes you can tell males from females...

Unfortunately i can't claim those plants as my own! The owner of those plants is HappyGrowing86 (https://www.rollitup.org/members/happygrowing86-224749.html) He posted those pictues while helping me with a question i had in this thread...

I'm getting confused... So many questions, and now i dont even know what plants you're talking about. Lets clear up confusion... Post some pics of the plants you want to talk about, and explain what your problem is... By the way you need a temp guage - you simply just can not guess it. Another...

I do have a fan in there, but its a bit too low i think. Cheers i thought that might have been all i need. I'll get onto it.

I've noticed this a bit lately. My plants are nice and bushy and are obviously transpiring alot because where one leaf sits on top of another, there is a water build up which is uncovered when i move them apart. Is this going to cause a problem? Should i have a fan blowing directly onto the...

My ppm meter is actually a EC meter - but it converts to ppm using either the 500 or 700 scale - my question is, which one is generally used around here?

By the way, can you also let us know when you last watered them. Unless the soil is bone dry, then DO NOT water them tomorrow. They already look over watered. The large light green one at the back clearly has a nitrogen deficiency. I think you have a whole range of problems, but you need...

Nope, they need lots of K (potassium) during flowering. They don't need much P, in fact, alot of good flowering ferts have more N than P in their flower formula. You need a thermometer so you can tell us how hot it gets at its hottest and how cold it gets at its coldest. Temperature is hugely...

http://www.amsterdammarijuanaseedbank.com/Growguides/Hydroponics/how-to-grow-marijuana-hydroponics-5.html "Recent research has shown that night cycle temperatures are just as significant as day cycle temperatures in plant production and it is in fact the relationship between them that has most...

I appreciate your help, but i don't agree. Nitrogen is a mobile element which means it can move around the plant. If i had a nitrogen deficiency, then i would be seeing it in the older leaves first. If you can find anywhere which says that a nitrogen deficiency can make new growth yellow while...

Nope, i continue the vege ferts until the middle of week 2. There's no way this is a nitrogen deficiency because it is affecting the new growth only. These are less than one week into flower anyway (actually, one week today).

1) 10-40-10 is completely the wrong ratio for flower. You want something more along the lines of 5-3-10. You want lots of potassium. 2) You want pH between 6.5 and 7 for soil grows. Just below 6 is too low. 3) Whats your heat like in there? To be honest, for 2 months veg they are pretty small...

My first question is what kind of environment are they in? Is it hot/cold? Windy? Lots of sun or shaded? What is the whether like?