Help

Okay after looking at your diary, I would agree with most of what numbers said, other than I’m confused about lack of nitrogen-because I was going to comment that the feed ratio was off with too much grow over bloom nutes. Was also going to say I think there’s probably some overwatering and roots issues due to that soil being so thick and heavy. You can see it’s all cracked apart in places in some pictures. I definitely wouldn’t flush this because it would just make the soil even more wet and heavy right now

i kinda skipped topics in that first paragraph -- the "it has a long trunk" refers to the plant in the back.

Probably needs a bit more N. The plant in back looks liek it has had way too much light - the nodes are too tight. The front plant is really small relative to the weeks in diary... it has a long trunk so it had too little early and too much recently -- things to avoid next time if you took good notes. ramp up a bit sooner, but don't go gas it so much. The length of stem that develops between nodes is your guide. you are using "regular flowering potting soil"? it's always a guess how you need to supplement a soil as time goes by. In week five i can see the start of nitrigen deficiency -- paling from tip-in and starting at bottom of the plant. This one looks fairly obvious. Again, keep soem notes about when this stuff starts to happen. If you use the same products next time, you know to amp up N a bit earlier. i woulndn't LST so extremely with autos unless height is an extreme concern. You may have slowed the plant down which is a reason for concern for autoflowers. back to substrate.. look slike it has zero drainage properties. This is also contributing to your small plants. If soil, use 1:1 with perlite or similar amendment. Thise gives a more optimal water:air mixture in the substrate for the roots. With coco coir, 2parts coco 1 part perlite. the premix 70/30 stuff is good enough too. Being a little off on this istuff is no big deal, but your soil looks virtually devoid of anything that helps drainage/aeration.

This isn’t looking like a calmag related issue to me. I’m going to go look at your diary