Plant sick, i need help (first grow)

[johnmandrake]

Hello,

I have a plant (white widow) grown under 4 25W CFL bulbs and a timer set to 18h light - 6h dark for about 3 moths.

Then I changed the box and the light (http://iluminat-special.ro//pdf_files/master_son_t_pia_plus_400w_220_e40_1sl.pdf).
After 1 week I have also reduced day light for flowering by 15 min/day.
For day's later the tip of the leafs started to lower down.
The following week the plant looks like in the pictures.
I have to mention that the temperature variates between 15 degrees C (when there is no light)-> 30 degrees C (when the light is on).
I have also attached a picture showing the hole box.
The bulb is separated from the plant with a glass and each chamber is ventilated.

What can i do to revitalize the plant?

Thank you.:rastasmoke:

[Mr. Clandestine]

Methinks there are other issues besides the new light, though I do think you're going to want to revamp your ventilation a little bit. 30C, or 86F, isn't terribly high, but it's not ideal. If I were you, I'd try to keep the temps between 21-26C. As for the splotches on the leaves, you should try filling out our Troubleshooting Form (http://boards.cannabis.com/plant-problems/127058-troubleshooting-form-yay-you-know-you-wanted-one.html), which will give people a better idea what might be going on in the soil as well as the environment inside the box.

Take care. :jointsmile:

[johnmandrake]

indoor or outdoor:
indoor

soil, soilless, coco, aero, or hydroponic:
soil

Soil type/brand:
S soil bought from flower shop

Anything you have added to the soil:
Nothing

Soil or slab runoff pH:
Soil ph is 6.5 to 7 PH

Water source:
Home water

Source water pH:
PH 7

Age of plant:
4 months

Type of fertilizer:
Fertilizer: N-P-K 6-5-6, 5ml/l water for watering, 2,5ml/l for splashing

Rate of application (if hydro, this is your PPM number, preferably after each component is added):
Once a day Splashing, once in 3 days watering

Lighting source and distance from plant:
High pressure sodium 400W 56500 Lm ( http://iluminat-special.ro//pdf_files/master_son_t_pia_plus_400w_220_e40_1sl.pdf)
At 3 Feet.

Air temperature (both day and night if you are running a dark period):
Day 25-31 degrees C
Night 10-15 degrees C

Air % Relative humidity:
Don't know..

Lighting schedule:
Night 8h30'
Day 15h30'

Type of ventilation your room has:
The plant's box has 2 active vents. The vent's are near the window of my room.

[sarah louise]

I think that if you stop splashing fertiliser on the leaves the problem will resolve itself. :thumbsup:

[Mr. Clandestine]

I think that if you stop splashing fertiliser on the leaves the problem will resolve itself. :thumbsup:

I'll second that. Some people have good luck with certain methods of semi-regular foliar feeding, but I've always been under the assumption that foliar feeding is best left for treating specific problems when there's an issue getting the roots to absorb nutrients.

[johnmandrake1]

Hello,

I stopped using fertilizer but the plant got worse. I also replanted to a bigger pot so that the roots would have more space.

What should I do?

[johnmandrake1]

Hello,

I stopped using fertilizer but the plant got worse. I also replanted to a bigger pot so that the roots would have more space.

What should I do?

I forgot to attach pictures

[sarah louise]

John I'm a little confused now, just how far is the lamp from the top of your plants? I know you listed 3 feet in the trouble shooting form, but your cabinet doesn't appear to be deeper than 2.5 feet (assuming the lining paper is in A4 sheets).

HPS lamps need to be considerably further away from the plants than CFL lamps.

[bombdiggity]

He has the bulb and grow space separated if I read correctly, so he can have it pretty close (as close as his temps will allow)

For example I have my HPS like 8 inches form my tops and canopy temp is 77F. I could put them within a couple inches if I wanted to.

I dont think the lighting is his issue here but we should wait for the experts :jointsmile: