Early Yellowing in flowering

7

707Napacalibomb

Well-Known Member
So I have recently switched from organic soil to rockwool and am using general organics in a hand watering system. Plants rooted in a 4 in block and then sitting on top of a 6 in block. I water every other day and have temps under 85 and humidity a little high at 43-45ish. The room is 4x4 with a 1000W about 12 inches away from plants. the plants dropped there lower leaves a little early after a few weeks in flower and now the upper leaves are seeing severe damage and yellowing. I have a very small fungus gnat problem and it looked like a couple where getting cal/mag lock out but upping the cal mag dosage seemed to do the trick pretty fast. I feed at light strength 900ish of the full organic line from GO. plus I use bud candy as a sweetener. This rooom is only optimum for two cycles a year before it gets too hot so I would like this to produce some solid flower. As is the buds are frosty and nice, size wise they are a little smaller than where I want them for 5 weeks 2 days, and the ones in the very front are 4 weeks 2 days.

Yall let me know if you have any advice like I said I am new to rockwool but not to growing. All of the environmental factors are just a little off but not enough to do this damage.

I will post pictures tonight when the lights are on. Thanks
 
bertaluchi

bertaluchi

Well-Known Member
Hey there brother, I have dabbled in some rockwool growing over the years. I have found that growing in rockwool requires a good flush between veg and flower. I used the GH line for that grow and I am not familiar with the GO line but I assume that you may need a good flush to wash out the salt build up. Other than that make sure your NPK levels are not too crazy. Some bloom boosters and some bloom nutes cut out so much N that the leaves start to fall off or die. If I were you I would take a 3 step approach to this issue. I would first flush, then give them a good N boost, and last step is to make sure you dont have an Iron def. Look on your bottles to see if your product has Iron (sometimes listed as Fe) in it. An Iron def can cause your leaves to start turning yellow but it starts in the veins and works its way out. I hope this helps you bro. If you have any more questions feel free to ask. Good Luck Dude.
 
curious2garden

curious2garden

Well-Known Mod
Staff member
707Napacalibomb said:
So I have recently switched from organic soil to rockwool and am using general organics in a hand watering system. Plants rooted in a 4 in block and then sitting on top of a 6 in block. I water every other day and have temps under 85 and humidity a little high at 43-45ish. The room is 4x4 with a 1000W about 12 inches away from plants. the plants dropped there lower leaves a little early after a few weeks in flower and now the upper leaves are seeing severe damage and yellowing. I have a very small fungus gnat problem and it looked like a couple where getting cal/mag lock out but upping the cal mag dosage seemed to do the trick pretty fast. I feed at light strength 900ish of the full organic line from GO. plus I use bud candy as a sweetener. This rooom is only optimum for two cycles a year before it gets too hot so I would like this to produce some solid flower. As is the buds are frosty and nice, size wise they are a little smaller than where I want them for 5 weeks 2 days, and the ones in the very front are 4 weeks 2 days.

Yall let me know if you have any advice like I said I am new to rockwool but not to growing. All of the environmental factors are just a little off but not enough to do this damage.

I will post pictures tonight when the lights are on. Thanks
Click to expand...
The fungus gnat larvae are eating your roots. I'd go straight to Spinosad 1 Tablespoon (15CC)/ Gallon with 1 drop of soap.
 
7

707Napacalibomb

Well-Known Member
Thanks man I thought in week 4ish that I might had given them too much nitrogen cause I was using GO full line with the biomarine as well. But thats not the case. I then definitely considered slat build up because I am going drain to waste and with those big blocks I dont generally see leakage unless I soak the shit out of them. Then the room is too humid so I generally water every other day. I put up a net today in there and everything smells good and their are decent colas for 5.5 week. They looked very good until recent and I had high hopes. But just want to get this right for the next run... Thanks for the help
 
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