Slow growth and leaf curl

Ok, it ain't lady"s but i hope To get some advice.
Started 2-3 weeks ago with ebb and flow setup.
(Thanks to this forum)
Growing peppers, but the leaf is realy Curly, the growth is also verry slow.

Im using hydroton in pots.
Covered pots and table with panda folie.
Feeding 0.8-0.9 ec after res change.
Kept pH from 5.5-6.3

Im flooding 4 Times a Day, 6 hours between each Flood.( First i did 6 Times, was to much?)

Light is 27 inches above canopy.


What am i doing wrong?

Water source?

Aapoo said:

Water source?

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Tap water, i'm from the Netherlands, water quality is good in my region, around 130ppm.

could be light stress, u mentioned how high your light is from the plant but not how strong your light is. usually curling is a stress towards heat (im not an expert) but this is easy to test. either dim down your light or take it up higher.
and flooding 4 times a day is perfect in my opinion ( im doing the same lol, every 6 hours and have never had an issue with it)

agree with Darkness, think lightstress is it, everything else in check? Dim to 50% in veg is good rule to follow. DLI is easier to meet in 18hr light than 12. Might be oversaturating! Id raise or dim first before feeding anything to them.

Southernontariogrower said:

agree with Darkness, think lightstress is it, everything else in check? Dim to 50% in veg is good rule to follow. DLI is easier to meet in 18hr light than 12. Might be oversaturating! Id raise or dim first before feeding anything to them.

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Actually i only use 200 watts f serie in a 3,5*3,5 ft room.

This lights can't be dimmed, so i raises the lights another a little bit.

Could it also be over/under watering?

Oh, also, My Basil leavestips are Brown/gray.

Geert said:

Actually i only use 200 watts f serie in a 3,5*3,5 ft room.

This lights can't be dimmed, so i raises the lights another a little bit.

Could it also be over/under watering?

Oh, also, My Basil leavestips are Brown/gray.

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What are you feeding? Basil and mj? Same?

Southernontariogrower said:

What are you feeding? Basil and mj? Same?

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Same, canna aqua vega a+b at 0.8ec
pH between 5.5 and 6.2

Geert said:

Actually i only use 200 watts f serie in a 3,5*3,5 ft room.

This lights can't be dimmed, so i raises the lights another a little bit.

Could it also be over/under watering?

Oh, also, My Basil leavestips are Brown/gray.

Click to expand...

did your light come with a ppfd map? like how much light it puts out at given distances? im asking because 200watts might not sound much but if you get it too close it could be more then a plant can handle, normally in veg state u want to be 200 to 300umols/m2 , now if you dont have an expensive par meter to check then best is to find the ppfd map for your light and see how far up you need to take it to be around 200ppfd.
now regarding over and underwatering, this could be an issue but you did state u are doing ebb and flow and flooding your table 4 times a day, as i stated in my previous post, 4 times a day is perfectly normal and ok and should not be the cause of it. You should look at the hydroton and see if its not drying out too much in between your cycle, over watering, i doubt could be an issue with hydroton. cheers and hope you find the solution.

Totdat u noticed strange black spots under the leafes of other plants wich started curling.
In can't wash IT of easily, what could this be?