COCO COIR Drooping plant with light on but recovers when light off. Other plants appear great.

[Darroldo]

Problem:
One plant droops.
When I first put the light on the plant in the orange pot looks ok but by the time the light has to go of 18 hrs later the plant is really droopy. Once the light is off the plant picks up. There are no spots or visible health issues just drooping on one plant. All plants have same watering and feeding schedule. All plants are approx. 3" + - 1/4"

Set Up:
Grow tent 32” x 32” x 63”H
MARS Hydro 400w LED dual spectrum (veg only spectrum being used) 42” from plants
Temp 20c -27c
Humidity 35% - 60%, average 40% - 50%

Seeds:

Humbolt Seed Organisation - Amherst Sour Diesel
All seeds germinated and planted at same time
All 3 plants popped through surface on 23/03/2020. 2 weeks total grow roughly
All 3 pots Coco Coir with 2/1 mix with perlite.
Light feeding schedule with Canna A + B 12.5m nutrients per 10l water
PH in 6.1 PH out 6.0

[Texasbob]

I think it's trying to tell you to back the light off it a bit. Raise the light 4" and see what happens over the next few days. When the plant gets used to it slowly lower it down.

[Darroldo]

Thanks for the reply Texasbob. that's what I was thinking I have almost no room left so I will go and put it further to the side. What do think of my good plants. is that reasonable for 2 weeks growth and do you think they look healthy. Any comments and advice would be appreciated

[Texasbob]

The plants look good, sometimes they get a little shy when first put under the intense led lights. I start mine with t5's and cfls and then put them under led's about where yours are now. When the leaves are reaching for the sky I know I'm alright and I can slowly start to lower the light. Keep an eye on your watering too. Overwatering can cause the leaves to droop to.

[Darroldo]

Again thanks for your feedback. I feel you are correct with the light intensity its nice having someone confirm your thoughts. I also feel that because it drooped I moved the fan closer hoping it would dry it out but I think the temp out the fan it was quite cool. I have moved the plant further away from light and fan. I'm feeling more confident now that is the problem cheers buddy

[Darroldo]

Pictures of Taco leaves

[quirk]

Good information. One of my autos of about the same age is drooping as well, so I cut off the drooping leaves and raised the light 6". Already perking up.

[Darroldo]

I cant raise my light but I recently downloaded a lux reading app for my phone so I'm spreading my plants away from the hot spots. 5000/7000 lux seems ok depending on the which plant. 5000 is what my droopy plant is at. My ones aren't auto but a grew a few of them ages ago with CFL's they were really nice but small yield. good luckand hope its good

[SoOrbudgal]

If I may say do not over water that will cause droop, lift the pot feel the weight go by that.

[Darroldo]

here are my plants at 3 weeks pictured today. One plant in the orange pot is still droopy but growing with no spots, discolour or signs of ill health the other 2 look decent but would like them to stretch a bit more but light is at maximum distance possible. Currently feeding with 15ml nutes but will be upping to 20ml/10l water in next day or two

[Darroldo]

This is where I'm at today with 20ml Canna A + B with 10ml water 3 1/2 weeks into growth. I have increased watering schedule to 2/3 times a week. Managed to get the plants to stretch a little. One plant is way bigger than the other two. Still one droopy plant but I think it is lack of water, leaves seem very dry. Looks like good under growth. Should I keep growing veg or start flowering. Its nearly 4 weeks since breaking through and the plants are between 6" to 7 1/2" in size