White tips, yellowing of leafs.

[SmokerJoe 1]

Hey dudes! This is my 2nd grow i'm growing 4 plants (all different strains) that are photoperiods in a 1mx1m tent.

im using air pots, a 400w HID with a lumii digital ballast with a built in timer, a parabolic reflector, I have a inlet fan placed just above the pots & 6" carbon filter! Im using BioBizz Nutrients feeding on a ratio on water, nute, water, nute and so on... I'm also using Maxicrop seaweed extract. Also i must state i am using biobizz light mix soil 60% and coco peat 40%

As you can tell this is an organic grow so i knew it would be harder than my last grow which wasnt... Im having a little trouble at the mo, i've nocked them over into flowering about 1 week ago and i've noticed the leafs have changed a lighter shade of green and starting to yellow a little, Also i've seen white tips on one plant (Sweet Cheese) thats quite bad & its slowly creaping up on the other plants.

I use a 1000ML jug of water to mix the nutes for 1 plant & The nute ratio's i use in this jug during the flowering stage are: 2mm of Maxicrop seaweed extract, 3mm of Biogrow, 4mm of Bio-Bloom & 2mm of TopMax.

I've never been one to check PH or any of that jazz as i'm now an organic farmer and buy top quality soils which are already PH'd.

If you guys could give me a some expert tips in what you think you can see is wrong or what i need to do to get these girls back into there healthy green luscious state then please fire ahead!

Ive also tried epsom salts & biobizz fish mix that a few members previously advised to me on here, But it seems to have just got worse.

Ive posted some pictures of the yellowing leafs i've removed here: http://www.uk420.com/boards/index.php?app=galleryℑ=277283

[Guest]

I'd say they're hungry chap. Try feeding every watering for a little while or raising the feed (Nitrogen) but I think it's worth checking your ph just to be sure because it's very possible that they're just no uptaking the feed. Could also be down to cold temps, particularly at night. I'd start there and work my way back.

[weedshark 524]

they are saying quote "i have the need, the need for feed" like in the movie top bud.

Edited January 1, 2015 by weedshark

[SmokerJoe 1]

Ok cool, I'll try feeding every day then as i'm in air pots i usually do water one day and feed the next, But ill try everyday and as for cold temps i can imagine it gets quite cold at night as i'm growing in a basement, So i could maybe try taking the inlet fan off at night?

[SmokerJoe 1]

@@Snowziff

[Guest]

I think turning the inlet fan off at night is a good start, deffo. Might still need a heater for the cold nights tho chap. Honestly does make a huge difference. TBH, I think it's probably best to try one thing at a time, maybe starting with the temp issue first because if that is the problem you might end up burning your plants if you feed extra. They'll survive the way you're feeding and should stay relatively stable imho. If there's no change after addressing temps that's when I'd consider upping the feed.

Best of luck.

[Road_Runner 5,024]

Never turn your air exchange off, it needs to be on full whack 24/7

If your grow room is cold you need to warm the air going in.

RR

[Guest]

Never turn your air exchange off, it needs to be on full whack 24/7

If your grow room is cold you need to warm the air going in.

RR

He's talking about intake air though chap. Passive can and does work if done right. That said, I'm somewhat in agreement with you. Sometimes you have to use what you have at your disposal is all.

[Road_Runner 5,024]

Yes quite often we just have to do the best with what we have hey @@Snowziff

As long as your getting enough fresh air in the all good.

RR

Yes quite often we just have to do the best with what we have hey @@Snowziff

As long as your getting enough fresh air in then all good.

RR

[SmokerJoe 1]

Yeah i've started turning the fans off at night and the temps at night are coming in at around 18 degrees now i've turned them off, Which id say is acceptable. I leave a gap open in the top of the tent and a leave topping fan on so there is air movement.

I'd say that there on the mend as the heads have shot up loads and the yellowing leafs have almost stopped & one of my plants has gone a really luscious green.

Im also giving them feed every watering using 3ml of bio grow, 3ml of fish mix, 2ml of maxicrop seaweed x & 2ml of bio bloom (Just so it pushes them in the right direction to start flowering) As i'm yet to see any hairs and this is a couple days over the 2nd week of flowering.

@Road_Runner

@@Snowziff

[Guest]

Mate, never turn your extraction off! Get a speed controller if you need it turned down but never turn it off. All sorts off problems come with that.

[SmokerJoe 1]

So leave the carbon filter on and the inlet off?

@@Snowziff

[Guest]

Yes mate but make sure there's an extra flap/hole or vent open for enough air to get in passively. Not too much though else the smell will escape.

[SmokerJoe 1]

Ok sweet i just got one of those soil ph testers and its reading awfully high in alkaline. the picture is here of the PH: http://www.uk420.com/boards/index.php?app=galleryℑ=278437

@@Snowziff

[Guest]

Thing is mate, those types of testers aren't very precise at all. I've got some in coco and they show very different readings to my ph kit and pen. If you want to check your soil ph cheaply, try one of those little liquid kits where you take a sample of the soil. Otherwise you can wait until next watering and test the ph of the water going in and the run off. That'll give you a good idea of what's going on in the soil but you'd still need some reliable form of ph test. Liquid drops are cheap and relatively accurate but I wouldn't be without a pen since I started using one. You can get cheap ones for around 30-35 quid which I've managed with for a while. I'll be investing in a better quality one tho and would say it's worth doing from the start if you have the money to spend.

All that said though, it's not the issue I don't think. I'm not a soil grower really but I do know that soil handles ph differently to hydro/coco/soil-less. It's forgiving to some extent and naturally buffers it. Honestly, I just think it's a case of raising night/lights off temps and upping feed slightly. It might take a week or two to turn around. You probably need advice from someone with a better understanding of soil than me.

What does new growth look like?