
They most likely will remain shorter. did you top the 2 smaller ones? anyways you can use anything thats sturdy enough to support them that will put them to the height you need. just dont use anything that you wouldn't want to get wet.
You could also do some LST training to help lower the height of the bigger 2. it never fails i always have a short plant in my grows

How do you do do low stress training on the bushy one

youtube.com/watch?v=vkjNajCtSQo youll have to add the www. back in front of the link but here is a guide Macky made on LST training.

Yeah i will second twisteds advice, realistically LST is your best option, you can try raise an individual pot but a sativa dominant pheno could end up 2 feet higher than the rest and that's a lot of raising, If you make use of some LST training now and get those branches bent over you will also find your canopy is fuller and more even because you have allowed lower growth the ability to reach the light and not be in constant shade. The Link Twisted supplied is the best explanation of how and why to LST, if you cant find the clips Macky uses in the video, you can also use pipe cleaners or garden wire to create the same effect. If your unsure just ask, i think i go into detail in one of my diaries about how i LST using pipe cleaners if you decide to go that route let me know and i will find the diary entry and send you a link
Strain height can be a pain in the butt. I bought some CBD seeds from ILGM but didn't notice the plant was sativa dominant and grew to 7'. My room is 6' and my other strains are much shorter.
Placing the lights is tough with multi-strains.
I have two strains now. I brought in a smaller light for the Girl Scout Cookies. Hopefully, she stretches a little more.
That's the great thing about individual buckets with soil. You can set them on a box to raise the height of different strains or runts. With hydro I have one height. I bet RDWC with buckets can't be lifted either because of water flow. Can anyone confirm that?

yeah can confirm no lifting, good luck lifting one bucket in rdwc without lifting the entire system lol, single pots are easiest for maneuverability but yeah your kind of stuck with limited options in a dwc or rdwc setup.
Rubber coated gardening wire is a real easy way to train. Just hook one end around the stem near the top and other end of wire under pot. Just make sure you are gentle and don't try to bend any woody stems too too much. 😉
Photo of mine for reference.
"Be excellent to each other."
-Abraham Lincoln- kinda
That's cool! I like the angle.
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