Has anyone else messed with this? Any tips or successes please share. Those are 2 Empress of India, 1 Jewel mix, 1 Alaska mix for anyone wondering. Lacinato kale bottom right in my other unit. Desert rose in the small pot on the floor. Microgreens tray covered on the left. I’m think about putting another tub underneath on that shelf with all the hydroponics equipment. Creating my first double stack vertical DIY DWC setup for a total of 8 tropaeolum with side lighting. Ideally they’ll fall down the sides, we’ll see.
Hard to tell what’s happening here. Maybe more info about your grow setup could get more response.
That being said, if this is a hydroponic rig of some sort, I can say that not all plants can grow well in such setups for various reasons. Plants take different nutrients ratios in hydro versus soil due to the dilution in water vs soil, and how much they can absorb at any time.
Here are the roots under the lid.

Tropaeolum growing hydroponically deep water culture. LEDs provide side lighting rather than above so they don’t grow inward and over shadow each other. More vertical space down the sides for them to naturally hang down. These have been growing rapidly now that they are properly rooted and I have the nutrients and acidity balanced.
Well that might be the issue then, because I’m reading these plants actually thrive in nutrient deficient soil for the most part unless flowering.
If that’s the case, just hold back on refreshing whatever you have in there now on your usual schedule. If they start getting new growth when what you’ve added has been used up, just add 1/4 of whatever you’ve been adding at the next refresh after letting it lapse.
So skip a refresh, see how they do, then wait a full refresh period before adding 1/4 the amount you normally add.
Here’s the one I’ve had for a little while for reference, grown in soil.

And here’s what the image looks like rotated 90 degrees for fun.


