Help! 26th day of flower, yellow tips on top leaves

[riley22]

This is a purple wreck, she is 26 days in flower and is starting to get yellow on the tips of the top leaves. There are also some leaves around the buds that are folding under and kind of bending down from the middle(see pics).

E-indoor or outdoor indoor
E-soil, soilless, coco, aero, or hydroponic soil
CSL-Soil type/brand FFOF
SCL-Anything you have added to the soil 1/3 perlite
SCLR-Soil or slab runoff pH 6.5
E-Water source Tap Water
E-Source water pH 8
E-Age of plant 9 weeks
E-Type of fertilizer Fox Farm big bloom
E-Rate of application (if hydro, this is your PPM number, preferably after each component is added) 1/2 strength, water with plain tap water every 3rd watering
E-Lighting source and distance from plant 400w HPS hortilux bulb
E-Air temperature (both day and night if you are running a dark period) 81 highest 70 lowest
E-Air % Relative humidity 43%
E-Lighting schedule 12/12
E-Type of ventilation your room has 425 cfm exhaust w/carbon scrubber

riley22 Reviewed by riley22 on 10-17-2008. Help! 26th day of flower, yellow tips on top leaves This is a purple wreck, she is 26 days in flower and is starting to get yellow on the tips of the top leaves. There are also some leaves around the buds that are folding under and kind of bending down from the middle(see pics). E-indoor or outdoor indoor E-soil, soilless, coco, aero, or hydroponic soil CSL-Soil type/brand FFOF SCL-Anything you have added to the soil 1/3 perlite SCLR-Soil or slab runoff pH 6.5 E-Water source Tap Water E-Source water pH 8 E-Age of plant 9 weeks Rating: 5

[riley22]

Jut wanted to add that I flushed her today with RO water. PH of the RO water is at 7(was thinking this could be a PH lock out issue). After flushing, watered with 1/2 strength fox farm big bloom.

[SpaceNeedle]

Well, I can't say what it is, but I certainly wouldn't lose any sleep over it. The plant is about 4 weeks into flowering and its prolly feeling that there aren't too many days left in its life. Some just tend to go that way near the end of their cycle.

sn

[Weezard]

This is a purple wreck, she is 26 days in flower and is starting to get yellow on the tips of the top leaves. There are also some leaves around the buds that are folding under and kind of bending down from the middle(see pics).

E-indoor or outdoor indoor
E-soil, soilless, coco, aero, or hydroponic soil
CSL-Soil type/brand FFOF
SCL-Anything you have added to the soil 1/3 perlite
SCLR-Soil or slab runoff pH 6.5
E-Water source Tap Water
E-Source water pH 8
E-Age of plant 9 weeks
E-Type of fertilizer Fox Farm big bloom
E-Rate of application (if hydro, this is your PPM number, preferably after each component is added) 1/2 strength, water with plain tap water every 3rd watering
E-Lighting source and distance from plant 400w HPS hortilux bulb
E-Air temperature (both day and night if you are running a dark period) 81 highest 70 lowest
E-Air % Relative humidity 43%
E-Lighting schedule 12/12
E-Type of ventilation your room has 425 cfm exhaust w/carbon scrubber

Aloha, Riley

What size shoe you got on that girl?

Regards,
Weezard

[riley22]

I think its a 3 gallon, its about 12" diameter, and a foot tall. The plant itself is 3ft

[Weezard]

Hmmm, That sounds big enough.
But there's something going on here.
The yellowing looks even, no big spots,
Might be as Space needle said. Just sucking up the last of the nitrogen at the end of the bloom.
I'd relax and watch her for a while.
Fixing things that ain't broke can do more harm than good.

Regards,
Weezard

[daihashi]

A few questions..

How long has it been in the 3 gallon pot?

The PH you listed. Is that the PH of the solution you mixed or of the runoff that comes out the bottom of the pot?

Your source water PH is extremely high.. 8? What is the ppm of your water, is it well water or city water?

How many gallons did you flush with? for a 3 gallon pot you need 9 gallons minimum; also you flushed at the wrong PH. You wanted to flush between 6.3 and 6.8. 7.0 is a bad ph for soil.. or really for growing cannabis in any medium.

[riley22]

I put her in the 3 gallon pot the day before I switched to 12/12.

The ph of 6.5 is from he run off.

I'm not sure of the ppm, but my source water is city water.

[monkeywrench]

Same thing happened with my plants recently, harvested just fine. It was rootbound when I pulled it out, so that's what I would attribute the leaf curling to. Yellowing, as said, seems normal.

[stinkyattic]

Your high source water pH may be from a high mineral content; if you have not watered to the point of runoff recently, I'd do that to help clear out any buildup in the soil, making up your fert solution at 7.0 to just SLIGHTLY raise the runoff pH. Water until a significant amount comes out the holes, and go back to your normal schedule, making sure that there is a gallon of soil per foot of main stem.