I originally thought some clones i bought were suffering with LSF See link here:

http://www.uk420.com/boards/index.php?showtopic=194428

But as Lazi suggested I think its a totally different issue. The feed mix I used when i got them was half strength Formulex (0.6) and half strength Rhizotonic with double strength Microbiol (its supposed to be 1ml per 2L but I misread the first time). I used this mix to water the plants twice. I've since treated them with essence (foliar and watering) and mixed a new feed which i used two days ago but the clones still don't seem to be on the mend. The second mix was stronger in nutes taking it to an ec of 1.0 in feed and still half the recommended amount of Rhizotonic plus the proper amount of Microbiol (1ml per 2L). I've got good air exchange which is on 24 / 7 and all the plants are under 1 x 600W light at the mo.

The two worst plants are white berry - as you can see in the pics the stems are really purple and now so are the veins on the leafs which are all turning yellow from the bottom up. The other clone pictured is an Icecream and you can see the brown spotting that i mistook for LSF.

From reading the grow FAQ and looking at the pic in Bish's thread (link below) might suggest that I was short of all three of the main elements ie nitrogen phosphorus and potash. If this is the case should i be increasing the amount of feed though or am I somehow locking these elements out? should i try using another nute to formulex? I have some 3 part ghe but don't have the mix ratio for it yet.

http://www.uk420.com/boards/index.php?showtopic=92176

they look starvin mate , id up the ec to 1.4 and see how they go

Hiya

By the looks of the whole plant I'd say there's something underlying any deficiencies that you have.

You mentioned that you've had rootrot in past (in fact) the previous grow.

How are the plant roots looking? - any pics?

Despite sterilising your kit I've heard (and am beginning to experience) that it's a bugger to get rid-of - it sounds like the spores are pretty-much always around waiting for the conditions to be right to infect your plants - apparently the heat & humidity of the summer months helps to create these conditions.

Might be worth doing some investigations to see whether it's a likley explanation...

Cheers

Stan

I hope not stan - the root rot grows were 4 months ago now and I've done nothing with the room until looking to start this grow. I threw out all my old kit (except lights and fans) and bought new. I bleached the room with such a strong mix of bleach and water I was lucky to get out alive, never mind any bugs. If its still in there after that I can't imagine anyway to get it out. I'll try get some pics up of the roots later - gotta dash at mo but think they are okay. all new roots are coming through nice and white and older are looking a little browned but not as bad as when i had root rot on my old grow.

I was thinking I must have done something t block out the nutes somehow. I've just foliar fed them with the nutes then increased the nute strength using my GHE flora grow, bloom and micro three part. It is now reading 1.6 (bear in mind with additives) and fed again. Fingers crossed

The right conditions in the res can cause root borne diseases, especially if it's heated and not changed but just added to as and when more water/nutrients are needed.

Peace,
GG

Hi GG - cheers for popping by.

I'm not using a res at this stage as I didn't want to put these into a system until I was sure they were fully on the mend - they are just in 3" rockwool cubes and being watered manually from a 10L bucket - not using a heater in it, jut using it at room temp and its changed at least once a week.

i still think its plain old hunger

they are far to big to be in a cube , they need potting on or transplanting to the system and a good feed

GG

I'll try getting them in the system tomoz night and see how they get on matey. I'd been holding off whilst i saw them get healthier looking. Do you reckon they will come around okay or would you suggest starting again. I was going to start from seed again but was offered these from a friend.

is the bottom of the cube full of roots ?

are they white ?

Here are some pics or underneath - you can see the White berry has browned off a bit but the Icecream don't look too bad IMO - what you reckon? The roots on the three from seed are whiter but these clones were taken a bit late into flower and took some time to come back to veg.

Here's a pic of all the candidates

hmmmmmmmm they dont look the best mate , looks like they are starting to rot

you could put them in the system and treat with cannazyme ,and see if they start to put out new root growth

Agreed - I hadn't realised they weren't in a system either...

That having been said, I've been having real problems getting plants with roots like yours (ie dead after emerging from the cube) to grow new roots - there was even talk of plants getting 'locked-into' rockwool cubes on a thread t'other day...

So I'll be interested to see how they get-on...

ATB

Stan

Thats settled then, they're off in the bin and I'm ordering seeds today. I'm not risking another outbreak of root rot after the trouble i've gone through to get it out.

I'll prob go for the Icecream again cause I heard good things about it and maybe Wappa or Northern Lights - hmm? Watch this space for the diary.

Thanks for the input lads. -

if it was me id put them in the system and try and treat them while you are waiting for seeds to come and sprout

¿Why not try and take some cuttings from some of the healthier-looking branches - it'll be faster than starting from seed again?

Also. ¿are you sure those dead roots didn't grow out of the cube OK, but have now air-pruned themselves and died from exposure?

Agreed - if they've not been in a system yet then give 'em a chance... I only suggested root-rot as a possibility to consider & watch-for...

That's correct -they did come out of the cube okay and have browned with exposure to the air. All I was thinking is that if they were starting to rot I couldn't bear getting root rot in my system and room again, it was a real nightmare! Perhaps I'll try get em in tonight and see how they get on - I'll think about it today.

Some peroxide in the water will help kill root rot and stop it spreading but it would hurt any friendly fungi in the water and root zone.

Peace,
GG

Cheers GG - I've been using MicroBial to reduce the chances of pythium or any other unwanted nasties and use Oxyplus (H2O2) intermittently anyway. Like you say the disadvantage of both of those is that they kill off any helpful critters such as the trichoderma in essence.

Air pruning and the whole root mass dying off from root-rot are two completely different things - if you leave roots exposed to the air for too long, they always die off like that (the bits that are out in the air do, anyway).

Get 'em in your system - they'll probably start thriving if treated right.

fingers crossed - watch this space