Grow Problem ?

[nitram]

I've got this one plant - 1 of 4 which was from clone 6 weeks in veging under 400 w HSP. I put them to flower 14 days ago. The plants R 4.5' tall. 3 are looking nice, However, this one's a problem

 

Medium is Coco - nutes R COGr - Flores (Yes I know these nutes R specifically designed for Coco bricks).

 

Has any one got any idea odf what problem I have ? :whistling

 

 

Thanks (N).

Edited July 30, 2005 by nitram

[Tom]

It could be root bound, as the pot is a bit small for a plant that size, have you noticed any little black flies hanging around the plant?

 

[animal]

It seems from the pics that the sickness is mainly at the top of the plant and the bottom leaves look more or less healthy. This would lead me to guess the problem is not in the feeding/watering regime. The fact that the other plants are healthy also tends to rule this out. However even so its not a good idea to continue to feed full strength nutes to a sick plant. I would flush it thoroughly and ease back on the nute strength. I assume you are checking the PH and keeping in mind coco systems are usually more suited to a higher PH than convention hydro...

 

Heath stress or burn is another other possibility. you're not spraying the plants under the HID lights are you? If you are then I'd suggest you stop.

 

Only other thing it could be is a pest or viral infection of some kind. Hang one or two of those yellow sticky traps in your growroom. They can be good for detecting the presence of pests before the naked eye notices them.

 

If it continues to deteriorate and the other plants still look healthy I'd remove it before the problem spreads.

[nitram]

animal:  It seems from the pics that the sickness is mainly at the top of the plant and the bottom leaves look more or less healthy.

 

It has worsened today. I responded with a trim off the affected deadening leaves :smoke

 

However even so its not a good idea to continue to feed full strength nutes to a sick plant. I would flush it thoroughly and ease back on the nute strength.

 

Ok I will flush with PH'ed water ASAP as I have just feed them.

 

Why if the nutrient OD on "N" R'nt all the 3 plants affected :sly

 

Only other thing it could be is a pest or viral infection of some kind. Hang one or two of those yellow sticky traps in your growroom. They can be good for detecting the presence of pests before the naked eye notices them.

 

The only thing Nope, I don't think so -

 

Tom -

It could be root bound, as the pot is a bit small for a plant that size, have you noticed any little black flies hanging around the plant?

 

Not pest. Could be root bound as I was away and veged em extra 2 weeks. the pots R 7"x 7" by 9" deep (square) & plants R 5' Max. so I check the bottom of the pot ant appears ok - no sign of roots. I have a big plastic pool which catches the "run off" & 500 ml measuring can. 1 x 500 ml can will fill 1 pot with-out any run off. I usually add another 200ml to acdheieve the "run off"

 

I suspect heat (mopst serious serious light burn) - most likely. OR possibly :whistling nutrient problem like "N" overdose.

 

:yingyang

N.

[animal]

I think its unlikely its an N overdose. But flushing and cutting back on the nutes until the plant shows healthy new growth is still a good idea.

 

Its also unlikely that the plants are rootbound if the roots haven't even reached the bottom of the pot. However I think this is unusual for a plant already in flower. If you had a healthy root system it should have spread throughout the pot long ago.

 

Is that plant taller and closer to the lights than the others? Or did you spray it while you didn't spray the others? If so, then I suppose heat stress or burn is a more likely possibility. If not, then you should look at some other aspect of the environment that is different for this plant than the others. The only thing I can think of is infection or disease...

[Tom]

Could be root bound as I was away and veged em extra 2 weeks. the pots R 7"x 7" by 9" deep (square)

Way too small for the job, for plants that size I would be looking at a bare minimum of 12" across and deep and wishing they were in something larger, time to transplant her and any others that are in pots that small.

so I check the bottom of the pot ant appears ok - no sign of roots.

Are you using a pot sock or some sort of mesh screen on the bottom of the pot, this could stop the roots getting out of the pot?

 

It has worsened today. I responded with a trim off the affected deadening leaves

As animal suggested, time to get her out of there until she improves or dies, there are quite a few pests and diseases that you don't know are there until it's too late, don't risk your other plants as well.

 

 

Check out this link to see if anything shown there matches your problem. http://www.geocities.com/nutrientproblems/

 

[nitram]

animal & Tom thanksfor fast replies :smoke

 

animal:  think its unlikely its an N overdose. But flushing and cutting back on the nutes until the plant shows healthy new growth is still a good idea.

 

Done the best job ib the trim. - So I will watch the new growth. I have also raise the light 4". Fans on and opend a widow for some fresh air too :whistling

 

I think it is too late to repot Day 20 12/12 Praticality & cash flow prevent this possibility. Theoretically :thumbsup

 

So repotting is out. Next grow I will keep my timming of veging (18/6) down to 4 weeks would help................ ah the joys of going away (returns form holiday) :thumbsup

 

Tom:  Are you using a pot sock or some sort of mesh screen on the bottom of the pot, this could stop the roots getting out of the pot?

 

Not in this grow. Previoudsly I have put "Hydrotron" in the bottoms but I did not do this on this grow to increase water retention while away. No capaillory matting.

 

 

As animal suggested, time to get her out of there until she improves or dies, there are quite a few pests and diseases that you don't know are there until it's too late, don't risk your other plants as well.

 

eeemmmmmmmmm oh, no, no, ......................

 

what about my theory on light burn as being the problem......

Sorted today by raising the light. Now a good 30 cm above the plants - wait and see approach :whistling

 

N.