Sick plants

Hi there, this is my second attempt at growing, the first time went reasonably well. So the deal is that I have germinated 9 White Rhino plants from seed. I left them on the windowsill to 'veg' for 2 weeks or so but noticed they were stretching a little so I have put them under a 600w Sodium lamp and turned it to 12/12. 6 of them are happy little things, while 3 of them have strange leaf problems. (see photos attached) I have looked through the sticky post of the various leaf problems, but I can't work out which one it could be, to me it looks like it could be any of them. They were on a high nitrogen feed, but now under the lights I have put them on a relativley higher potassium/phostphate feed. If anyone could advise me, it would be much appreciated. Thanks

to me over watering as thay are very wet, and nutes burn over feeding, i wood stop feeding them for a week or so? then start feeding them agen but half as much.good luck

I had just watered them which is why the soil looks so wet. I don't think it is that as I only water them when the soil is in need of it. It could well be too many nutrients, although I do follow the instructions on the back of the packet. I'm also wondering why it would only hapopen to 3 of the 9 plants as they all get exactly the same feed.

You vegged for 2 weeks and had them in a high nitrogen feed? Looks like they are in soil, right? I'd say it's nute burns you are looking. You shouldn't have needed to feed them for the first month if they are in soil. If you felt compelled to give them nutes, I would have started out at 1/4 recommended dose and slowly build from there.

ok thanks, I will give the soil a rinse and cut down the nutrients.

hearmenow said:

You vegged for 2 weeks and had them in a high nitrogen feed? Looks like they are in soil, right? I'd say it's nute burns you are looking. You shouldn't have needed to feed them for the first month if they are in soil. If you felt compelled to give them nutes, I would have started out at 1/4 recommended dose and slowly build from there.

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i agree ... i fed my babies around 2 weeks in but i fed them the littlest dose of nutrients

Yeah I would transplant into a bigger pot asap, cuz dat 1 looks a lil small. gonna become root bound and stunt growth.

Psy had a point. Those plants are getting a little big for those pots. Looking again at your pics, there isn't enough soil in those pots either. You should have soil up to about 1" from the top of the pot. Get some perlite at HD ($5 a bag) and mix with your soil in a 5-1 ratio before your transplant. This will help drainage and allow air to circulate in the soil.

Thanks all for the advice. I'm assuming Perlite is insulation material sized like small pebbles used in housing?

Also im not sure what kind of nutrients your using, but you probably should not follow the box. Cannabis plants arent as strong as most plants and you should only be using about 1/3rd of what the box says to start out with. Unless you bought nutrients specialized for Cannabis. I wouldnt say that the plant is root bound yet, but like the others said, I would start getting ready to transplant. I woudl also reccomend going to Home depot or lowes, or a local garden center, and picking up some transplant solution, its high in phosphourus and will greatly help reduce shock for your plant. I have transplanted with and without this stuff, and its insane how well the plants respond to it. No stress at all if you do a decent transplant.

Goodluck buddy, hope you get some good smoke : )

Grow on growers < 3

Thanks again, i'm thinking about moving my plants to other pots, i see the general consensus is to move them but the photos I have are a little misleading. All taken at silly angles, the pots are a fair bit bigger than they look in those shots. If it's needed I will of course move them but the last plants 3 plants i grew were in the same size pots and seemed happy until i chopped the fuckers down and burnt them.

You need horticultural perlite. It's widely available - HD, WM, Lowes. If they have vermiculite, grab a bag of that too, it also helps aeriate the medium, improves water-holding capacity and assists with nutrient exchange needed for good plant growth.

Ok so it's a little like a cross between using soil and mineral fibre? I will give it a go, but I worry that if I do that now, it will not do that much good at the soil is bound around the roots.