Possible problem with yellowing of leaves pics!

hi guys hope someone can help abit here, stats as follows

started frrom armaggedon clones
autopot system,
rockwool mix medium
600w hps
temps 22 day 15 night
humidity 30-40%
ph 6.0
food is ionics bloom and its on 22 cf on my truncheon
vegged for 4 weeks on 400w mh
added ionics boost 1 week ago (start of week 5 flowering)
currently 1 day from being 5 full weeks in flower

alot of the leaves are a pale green and starting to yellow and die, it started about 7 days ago or so, so they were flushed with seaweed with sequested ion, to help with the yellowing and replace any lost ion, didnt really make much of a difference to be honest,
now are they ment to be dong this or not yet?
they technically have 3 full weeks of flower left,
heres some pics,








it was hard to accurately take a pic of the colour while under the hps so i lifted it out the enclosure for the rest of the pics,
thanks for any help

Check the ph of the drain off. May be too high locking out the nitrogen. Some yellowing can be expected during the flowering stage. Does the rock wool have salt buildup? I would FLUSH< FHUSH<FLUSH with distilled water only. Good luck

grass master 09 said:

Check the ph of the drain off. May be too high locking out the nitrogen. Some yellowing can be expected during the flowering stage. Does the rock wool have salt buildup? I would FLUSH< FHUSH<FLUSH with distilled water only. Good luck

Click to expand...

hi, i havent noticed any salt build up on top of the rockwool mix, i havent dug into the rockwool to check further down though, not sure how i can check the run off to be honest as the pots sit in tiny trays that only just have enough room for the aqua valve, so the water isnt in the long before it gets topped up, i will flush again tommorow i will have to remove the pots out of the enclosure to do it though as the trays will over flow,

any other ideas?

looks normal too me, you want to look nitro def in the end. it lets you know your flush is working. mine start looking like that around wk 5 and carry on until done around 8 or or 9.

I agree with slikwilly here. but you can give her a feeding or two fo your veg nutes-u dont mention what they were.

yeah, if the yellowing is signifigant real early i will give her a shot of veg nutes. its something of a fine line, yellow/missing leaves dont produce chloraphyll, so losing them all too early can hinder bud development. best of luck and the chicas look great!

check my journal, im sure i have some pics just like yours in there.

thanks for the replies,
the veg food was ionics growth
i might give them a little bit of that after the flush today just 1/2 litre each and then resume bloom and boost feed when they have drank it all, sound good? the fact that yellow leaves can stop bud development got me abit worried!
this is actually the better of the plants i have one that is alot paler all over but the bud sites look realy healthy producing lots of tricones and the leaves are a nice green on all the plants,

dont worry too much about losing some leaves. usually by the time i harvest ive lost 50-60% of my fan leaves. you can pull them off when they start getting dry. until they start to dry out they are still providing the plant with nourishment(thats the loss of color, nutes being pulled from the leaves storage) but once they start to dry out they just provide shade for lower leaves.

It's perfectly normal for fan leaves to turn yellow, curl up and drop off during the second half of flowering. It doesn't hinder bud development unless it starts in the first four weeks or so, when the plant is still producing some vegetative growth. After then, it will start using all the energy stored in the fan leaves to produce buds.
The plants in those pictures look great to me, you should get a good crop there.

Out of 6 plants...one really started yellowing early (3rd or 4th week of flower), but seems to be doing alright. I don't think you have anything to worry about...

too little N can delay budding as someone posted, but also too kmuch can do the same thing. feed her

thanks guys ive given them a dose of veg food, normal feeding will resume tomorrow, ill just let them go now until there done,

you done right

thanks mate