Can't seem to get rid of these woody stems,any ideas?

Hi all
So I'm two weeks from harvest on my fifth grow which have all been from seed so i pulled out the best two Big Buddha cheese plants to be mothers for the next grow.Now,these two mothers are approx 3 1/2 months old and i've had problems with nitrogen deficiencies being that they really turned light green on me.
I've been feeding them Biobizz Biogrow NPK 4-3-6 from right through from seedling and also boosting them up with a foliar feed of nitrozyme due to the Biogrow's low nitrogen content and the new foliage looks lovely and dark green.
They're both in my veg room under an 8 tube T5 flourescent pushing out 38000 lumens,temp's 80ish fahrenheit day and night,RH around 50-60% but the problem is really woody stems.Even the new shoots seem to be woody.
I took ten cuttings 12 days ago and only two have rooted.The others I threw away and went out and bought some more seeds which i never have a problem germinating.
I flushed them both today just in case there may be some sort of nute lockout and gave them a foliar feed of "plant vitality" and some more nitrozyme being that the soil should be nute free now(I think).
Does anyone have any ideas why these stems are real woody and red cos i'm getting pissed off with wasting electricity on these two suckers and might as well put them into flower if i can't sort this problem out.

oh are the stems purple? that may be some sort of lockout. either too much fert or the medium you use has soluble slow release fertilizers and the high temperatures are making them release (because you have no night time cycle?) if you had a dark cycle i bet youd see some serious growth because temps above 78 are recipe for problems

you reusing your soil?

Forgot to mention it's on an 18/6 cycle.I was thinking nute lockout hence the flush today and start from scratch again.The soil is the original from when the plant was a couple of weeks old.Probably has no nutes left in it at all.

well then i would say you did the right thing she just looks stunted probably too much feed, flushing her was a good idea, now giver her time with some regular water and i would feed something with high N later looks like it could be a P lockout from too much P.

have you ever researched bonsai? water the plant and trim back the rootball with a razor, remove undesired growth and re plant into a pot with some fresh soil if you dont want it to get bigger. i wouldnt do this if it was in a lockout though

They are woody because they are old mums on the way out, always start a new mum very 2 months to keep the clones healthy. In the meantime try cloning powder for hardwood.

*BUDS said:

They are woody because they are old mums on the way out, always start a new mum very 2 months to keep the clones healthy. In the meantime try cloning powder for hardwood.

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hmmm never had this problem with moms... ive kept moms for damn near a year plenty of times. but yes i agree with the cloning powder statement it does work better on woody cuttings.

*BUDS said:

They are woody because they are old mums on the way out, always start a new mum very 2 months to keep the clones healthy. In the meantime try cloning powder for hardwood.

Click to expand...

They're only 3 1/2 months old.I've only taken ten cuttings from them in total(5 each).Buds,I'm gonna give the powder a try,I'm using Clonex at the mo.

clonex suck... whats your rooting method? ive used many methods i find that bubble cloners work the best, take about the same amount of time as any other method, areo cloning, which have problems of their own.... but 100% guarantee of success.