leaves have brown marks, drying and curling upwards?

this has popped up in the last couple of days but for some reason got quite bad over last night
but basically what the title says is happening to numerous leaves on my plant, mainly leaves around the bud site but now some fan leaves too although not as bad.
my ph was at 7 for a bit around the time it happened however i have fixed it now to about 6.5 ish could it have been the ph?
also i thought it could be cold temps as i will admit sometimes the temp does get a bit low in the night
but isnt it supposed to purp if its cold? not sure, what do you guys think. im worried because my plant has about
2 weeks left in flower and i dont want this problem to affect the look of the bud, even thoufh
im more concerened about the high i still dont want horrible looking buds

What nutes you using?
Some nutes dont have enough nitrogen in bloom nutes, looks to me like you just ran out of nitrogen in ya soil and its stealing it from leaves...common acurance at end of flowering. Just put a little of ya grow nutes in with ya next feed. Wont repair it at this late stage but should hold it off getting worse til you harvest.
Im guessing bio-bizz.

Curling up could be a cal mag deficiency. There also looks to be different kinds of damage to some of the leaves which may indicate a lockout of some kind. Are you using hydro? soil? coco?
You could do a foliar spray of cal-mag right away to help it out.

Could you flush the soil with pure ph adjusted water and test the ec or ppm of the water coming out?

Get the ph closer to 6 or even 5.8 is my ideal spot. Even 5.6 in hydro.

also based on how white your plants pistolets or hairs are it really doesn't look like 2 weeks till harvest. looks like you still have some time till you take her down.

Good point about the time. I also think prob got more than 2 weeks left...if you are in soil 6.5-7 ph is fine. You wont lock out anything in soil within that range.

littlewing said:

What nutes you using?
Some nutes dont have enough nitrogen in bloom nutes, looks to me like you just ran out of nitrogen in ya soil and its stealing it from leaves...common acurance at end of flowering. Just put a little of ya grow nutes in with ya next feed. Wont repair it at this late stage but should hold it off getting worse til you harvest.
Im guessing bio-bizz.

Click to expand...

Im using fox farm nutes.
Nitrogen has been so weird with this plant since flowering. It's like no matter how much I feed it nothing makes a difference. I stick to the table that comes with the fox farm nutes and the leaves still look nitrogen hungry, once I gave it an extra bit and it still didnt make a difference.

mtlhaze said:

Curling up could be a cal mag deficiency. There also looks to be different kinds of damage to some of the leaves which may indicate a lockout of some kind. Are you using hydro? soil? coco?
You could do a foliar spray of cal-mag right away to help it out.

Could you flush the soil with pure ph adjusted water and test the ec or ppm of the water coming out?

Get the ph closer to 6 or even 5.8 is my ideal spot. Even 5.6 in hydro.

also based on how white your plants pistolets or hairs are it really doesn't look like 2 weeks till harvest. looks like you still have some time till you take her down.

Click to expand...

Im using compost, and its been perfectly fine up to now

I have done a few foliar sprays but they weren't cal mag, it was for nitrogen and it still didnt make a difference

I'll try and lower my pH a bit more to about 6.2 - 6.0

Yeah on that bud site a lot of the pistils are white, on others theres quite a few brown hairs, I do agree with you though about more than 2 weeks, I was just going off what the info on the seeds said which was 8 - 9 weeks flower and I'm on week 7

Are you counting your flowering time since light change or from appearence of first female hairs. This is what the seed companys work off.

Mmmmm..has this got any lower on the plant or just on or near the top colas?

Possibly these...

littlewing said:

Are you counting your flowering time since light change or from appearence of first female hairs. This is what the seed companys work off.

Mmmmm..has this got any lower on the plant or just on or near the top colas?

Click to expand...

im counting since i switched, i only did this though because i had numerous pre flowers before i switched.

and around the top parts of the plant is where its at its worse. only a tiny bit half way dow n and fine
at the bottom

FluAre you using soil or a soiless medium such as coco or peat moss? if you are using soil, I would flush them with water ph'd to 6.0-6.5. The continue feeding nutes after your soil has dryed out a bit. If you are using a soiless medium. I suggest you flush with ph'd water of 5.8 and continue feeding her nutes when the medium has dryed out a bit