Hi all,

Any ideas what this is? It's only affecting one plant out of 5.
The plants are 2 weeks into flower.Leaves affected are only the large fan leaves so far, 6-8 of them.
Temps in room are fine( 25 max 19 min ) humidity is a little high lights off ,70-80%.
In soil, fed with biobizz as per OT's schedule.

Click to view attachment

This is a friends plant.I personally don't thing its fungus, well not like the LSF I have,its forming too uniformly down the veins IMHO, but I'm very new to this so would be happily corrected. Can't see any sign of bugs although the search only took place with the naked eye.


Thanks all

There are several types, but its lsf.

Aye, looks fungal to me

hi there...
whats lsf.....?



ets.just checked it out...

Ok thanks OT/Mr P

I've told him the bad news , at least its been caught fairly early.

I have similar problems on a few of my plants and on some of them it happens along the veins like this and on others it's more scattered and random.

ouch withnail i havnt encountered the dreaded lsf yet and i hope not to. best of luck with tackling that fungal menace i will have to keep an eye on your diary which is always a joy to catch up on rebirth