Black hulk grow , slight issue

Bozo · Nov 30, 2025

Hi guys this this is my black hulk so far (bruce banner X black domina)
As you can see I have applied LST

I'm in 20 litre fabric pots and tent is 1.2 x 2.4 with a 4 inch rvk extraction
Soon to upgrade to 6 inch rvk

this is they're 6th week of veg planning to flip in a week or two

They are all from seed

Temps are between 21.5 and 28.2
Humidity is around 52
Using plant magic nutes

feeding every 4 days or so 2.5 litres at a time

Just concerned about one plant that has new growth coming out a bit curled and has a slight overall droop

All feedback is appreciated

Many thanks for reading

pnwbluntman · Nov 30, 2025

What kind of nutrients are you using? It looks to be a deficiency

pnwbluntman · Nov 30, 2025

Also are you having any run off when you are watering? What is the pH of the water being used to water, and what's the ppm and ec of your run off?

Bozo · Nov 30, 2025

pnwbluntman said:
Also are you having any run off when you are watering? What is the pH of the water being used to water, and what's the ppm and ec of your run off?

I am guilty of some things , I don't check ppm and ec. I don't have the tools too .... and I'm not watering to run off at this stage as if I did yhe pots would be soaked gor over a week at a time maybe longer ... I give each 20 litre pot 2.5 litres each watering. Usually every 4 days I do ph to 6.2 - 6.8. I'm actually underfeeding. Recommended is 2ml per litre I'm only doing 1ml per litre

Thankyou

Forgot to mention I'm under 720w led 3.2 umol turnt down to 250w at this stage

pnwbluntman · Nov 30, 2025

How far is the light from the tops of the plants? You can buy a ppm/ec pen from vivosun for less than 20. Its not as accurate as one that will go for more obviously. Actually rn they are selling a ph pen with TDS/ex pen run on eBay for less then 15 and it comes with the stuff to calibrate it. It's the one thing that will help you in every aspect of your grow and also help take out the guess work. And I would recommend to start watering till you see a bit of run off , and then let the soil dry. Rn your plants probably need more water

pnwbluntman · Nov 30, 2025

pnwbluntman · Nov 30, 2025

I don't know much about the nutrients you are using, but it's pretty much telling you the same thing I am

pnwbluntman · Nov 30, 2025

You will probably want to go to the next level of feeding for the plant soon, but first get that soil hydrated completely. Your roots will be stunted from under watering. You want the water to be at the bottom of the pot so the roots stretch and get bigger. And again try getting a pen. I didn't realize you were in the uk, so IDK if the eBay price will be the same. But find one to use eventually, because it really is good for your knowledge to know what going on and being able to pinpoint what a plant is needing a little easier

Bozo · Nov 30, 2025

pnwbluntman said:
How far is the light from the tops of the plants? You can buy a ppm/ec pen from vivosun for less than 20. Its not as accurate as one that will go for more obviously. Actually rn they are selling a ph pen with TDS/ex pen run on eBay for less then 15 and it comes with the stuff to calibrate it. It's the one thing that will help you in every aspect of your grow and also help take out the guess work. And I would recommend to start watering till you see a bit of run off , and then let the soil dry. Rn your plants probably need more water

Approximately 4 ft ..... much closer and plant begin to droop like the northern lights I just did can turn light up and lower the height at around 2 weeks after flipping. Then can lower down to around 18 inch from the canopy

I'll look into a ec meter

pnwbluntman · Nov 30, 2025

Ok yeah the light should be fine, I don't know the exact ppfd height recommendations for your light setup. But I would look at the chart for the light and see what ppfd the light is putting out at the power settings and at what light distance from the plant. The plants like 400-600 ppfd at the tops during the veg phase

Black hulk grow , slight issue

Black hulk grow , slight issue

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