My white widow leaves going brown!!

[oggy69]

Hi, i need help please, i have 5 white widow plants that are about 3 1/2 weeks old and the bottom leaves are starting to go yellow/brown. Does anyone have any ideas why? This is my first grow so any help will be appreciated.

Thankyou.

[Grub]

I've moved this thread to the Infirmary mate where you should get a better response.

Photo's and full details of your grow will help to figure out your problem.

[oggy69]

Thanks mate, im new to this.

[Grub]

Thanks mate, im new to this.

We all were once mate.

You'll soon get the hang of how the forum works.

[oggy69]

I have the white widow under a 125W flourescent bulb about 6-8 inches away. The temperature is about 24/25C in the day and about 18/20C at night. Im using coco professional + soil and i have been watering them every 3/4 days with plain water without nutrients. I have Canna Coco A + B but im not sure when i should start using them. The leaves at the bottom of the plants are a yellow/brown colour and i dont know if its something that im doing wrong????

Help please!!!!!!!!!!!!!!!

[Grub]

ok, you need to get that light closer to the plants first mate, else they will stretch to buggery.

What size pots are they in and when did you last repot?

[oggy69]

They are in 11L pots and i put them in these after about 1 1/2 weeks

[Grub]

Have you started feeding yet? If not it sounds like you should start mate.
As i've never used Canna Coco A & B i won't guess at what dosages you should be giving, i'll leave that down to someone who has used the products before.
Any thought's as to when you will be flowering?

[oggy69]

I was going to start flowering when the widow were about 12-18 inches high? Is that about right???

[Grub]

Under a 125W mate the sooner the better really as they will continue to grow after you have changed the lights to 12/12.
If i were you i'd have a read through the Novice section about LST (low-stress training) else you'll have a very tall, spindly plant with very few bud sites at the bottom.
If you can add more light, even a few household CFL's it will make a difference.