Improving stalk and limb strength?

I grow organically and my plants are healthy and produce pretty good but my stalks and limbs have to be supported all over. How can I help my plants support better weight and be a stronger plant.

From what Ive read is blue light will strengthen branches and stem.

One way is have a fan gently blowing the plant and or plants throughout its short life. Another thing that can help is better lights and a tent not packed so the light isn’t wasted.

I had one plant where I had 4 plants in a 4x4. It didn’t get enough light so it was like limp noodles. She was pulled and made into edibles, tinctures, and vape juice.
This happened under 2 HLG 260xl rspec lights.

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I’m using a 400w hps for autos and flowering photos under a 600w hps in a 5x5

Not sure what the organic option would be but adding silica weeks 2-4 of flower will help firm them up.