What is going on with my plant? Pics...

I’m growing an AK47 autoflower from Growers Choice Seeds. Using fox farm ocean forest under 2 300w mars hydro. Using fox farm trio for nutes and some calmag every other water..ph has been in check the whole grow.

The plant has been a beast! After 45 days it was 3 feet tall and very bushy and started to flower. I didn’t think it would get so big because it’s an auto flower so I used a 3 gallon pot.

I can’t tell if it’s root bound or if something else is going on but every night a few hours before lights out the top of the plant starts to droop really bad. It perks right up again in the morning.

It could be a few things man.
I'll try to list them-

Your ph could be too high. Try cutting your nutes. Give it some water, next feed. See if it improves. No fertz, no calmag. Thats where id start.
I think your soil's too hot, IMHO
Plants quite often droop a tiny bit, just before lights out. Then perk up by lights on. This is completely normal, and quite healthy.
Where it isnt healthy, is if your light is too strong, it can just be overload. Too much fertilizer can just amplify the problem too.
Id start by just water.
Those blurples, although not very effective from a distance, can be pretty damn intense. So have that in mind.
Good luck mate,
Let us all know of any changes.

The leaves look rather dark green! Normally means to much nitrogen! Have you changed over to bloom nutrients yet since its now flowering?? Too much nitrogen will cause lock out!

Thank you for the replies. I only gave her 3 feedings of the Grow Big nutes while in veg..I switched over to tiger bloom and the big bloom after the stretch was over and it started to make flowers. The plant grew so fast it’s like the top of the stems didn’t develop along with the rest of the plant. It’s only the top of the plant that’s doing this. The stem down bottom is over an inch think.

My ph has been a little high at 6.8ish when i feed the bloom nutes. I’ve had to use baking soda to raise it because the tiger bloom lowers it so much. I haven’t found the right ratio of baking soda to adjust it to 6.5 yet.

I had to add more top soil because the roots where growing out of the top of the soil. Very large thick roots. Making me think it was starting to get rootbound

It might be a little to close to the lights too.

Cant say ive used baking soda before
Id be tempted in thinking the carbonate would keep the ph, in your medium up, and ph would be hard to bring down, if you needed to.
I can't say though sorry. I havn't used bicarb soda before, but i'd be wary.
Happy grow man.

Baking soda raises the ph!! It's a soil mix your using so it will buffer the ph levels for you so no need to lower or raise the levels! I'd give your plant a flush and check the run off ph until it stabilises to the same ph as the water intake! Stop using the baking soda all together!

When I add the tiger bloom to my water the ph is below 5.2..so I use a little baking soda to bring the ph back up to normal. What would u recommend using to bring my ph back in check?

What's in tiger bloom? Is it a PK booster?

Flush! I had this exact problem a few times in the past. Everything seems all good then as soon as she starts to flower this happens. Flush with higher PH like 7.0, plenty of water(about 2 gallons). When runoff reaches between 6-6.5 stop watering and let her dry out really well(min 3-4 day). I think it has to do with nitrogen build up in the soil. She doesnt mind it till she starts flower and boom, nitrogen tox.

I will give it a good flush for sure. I’m using fox farm ocean Forrest soil and I swear it was different/hotter then the last few batches ive used from them. It smelled ALOT stronger then the other bags of soil I’ve used from them.

Tiger bloom is a 2-8-4 liquid fertilizer from fox farms. It’s there bloom nute.

Tlarss said:

When I add the tiger bloom to my water the ph is below 5.2..so I use a little baking soda to bring the ph back up to normal. What would u recommend using to bring my ph back in check?

Click to expand...

A proper ph adjustment chemical such as https://www.ebay.co.uk/itm/Vitalink-Easy-Control-pH-Up-and-Down-250ml-1lt-/152621294230