tops are finishing slower than bottoms and mids?

[spook719]

hello , im using canna a -b coco. My issue is roughly 3 weeks into bloom im noticing my tops are maturing slower than the bottoms and mids, even though the plants look healthy and are lush green. I was also having this problem when i was doing organics. but during that period i found out I was having root aphids and other critters in my roots. I still see the flyers around my roots but not the crawlers. So is it possible that the root aphids are causing this? Like i said the plants look super healthy and before when i was battling them my plants looked like shit, My guess was they were catching that virus that people are getting from the root aphids.
any help is appreciated, thanks.

 

[spook719]

oh ya and im using co2, my temps are at 80-85 lights on. and 64-66 lights off. ph is at 5.8-6.2 im using canna coco and there whole coco line. and its happening to all my strains some more than others. the ones more dominant sativa are less affected than the ones more indica.

 

[CheifnBud2]

is your light placed at the middle or lower part of the plants like a stadium setup? Ive always noticed the opposite in maturation.

 

[spook719]

I run two plants per light about two feet from the canopy. There in six and gallon pots. But its a normal setup. Not vertical.

 

[darrmann]

any pics you can provide? I run canna aqua, and love it.

 

[robbieson719]

Turn off your green light.

 

[ogtommy]

I had a similar problem. my lower buds were growing faster then my top buds which were barely growing at
all. New pistils were coming out all the time except from the top. this was on all my plants. turns out I had the 1000w hps too low.22". just under 2 feet. try raising your light 4-5 inches and see if it makes a difference. it did for me. oh yeah, if you did burn them it's too late to fix if you are late in flowering but the plant will automatically direct it's energy into the lower buds so although you might have a little smaller yield it won't be by much. smart plants. it pays to have a fan blowing over the tips of your plants.I used an infrared thermometer to test the temp of the canopy and found that with my reflector and bulb, optimum height is 26"