My two Grandaddy Purple Autos are light green/yell...

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Start again. All those leaves you removed were making the energy your plants need to grow. Less leaves = less energy = less growth. They also need some serious feeding, all sorts of deficiencies, but probably too late to recover any great health now that they are flowering. Sorry. Continue if you are happy to harvest a couple of spliffs worth, I can't see any potential at all in these plants and I doubt there is anything that can make them grow decent flowers, they are just too far gone in my opinion. Leaving a grow set up and running for 30 days unattended is a gamble I would not be prepared to take........... electrical fires are a real danger. Sorry for my blunt assessment.

Looks like the plants are hurting. What are you feeding them with? I am not aware of soil being feed automatically all the time, I feel it would be leached out and bad for root rot as it holds a lot more water vs coir. I've also seen a few bad run from seeds from ILGM, not always but they have some issues sometimes. Autos can also go into shock quite easily and be stunted and start flower early like yours have done. temps, to much feed, light stress are all thing that can set them off. Best Of Luck!