new growth yellowing and straggly (2weeks flowering)

blazedaway91

New Member
we have 2 blue cheese plants in soil. have been growing perfectly up until now.
for about 3 days now the new growth has been coming through yellowy and the leaves are very thin and straggly/stringy

they were growing fine, we switched the light from 18/6 to 12/12 about 2 weeks ago. continued to grow perfectly with hairs growing, indicating female plants.
we changed the pots 5 days ago on the saturday. we went up from 7 litre pots to 20 ltr pots, with a light soil mix with white airstones in the soil (i dont know what they are called, perlite maybe?) and gave them 3 litres of water each with 1.5ml per litre of bloom stimulant on the saturday and the sunday, with ph being around 7.2ish, a bit high. we then gave it a feed of 3 litres each on the tuesday, with hessi flowering complex 5ml per ltr and 1.5m of bloom stim per ltr.

since then, although one of the plants are showing great bud formation, the new growth seems to be coming through as we had described. pictures are attached, and other detals just ask.

we have been concidering it to be nute burn, but would like a experts opinion, as this is our first grow.

aswell, we have a 600w hps lamp about 11-12 inches away from tips, sometimes as close as 10 as we dont want it to grow too high too fast.

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