Help please

Any idea what this is
It happened last year too
Plants look good till bud time then start doing this

Robert venneri said:

Any idea what this is
It happened last year too
Plants look good till bud time then start doing this

Click to expand...

For others to help you better,will need info on what type of grow indoors, what soil, nutrients used.

Outdoor grow
Coast of main soil
jacks 20/20/20 nutes
Thanks for your help

I have plants with same soil and nutes and they are looking good

Bud worms?

Looks like fusarium wilt.

How many plants were affected last year? And how many weren't affected?

Last year about 1/3 were troubled
This year same so far

Stem borers maybe?
Do entire branches go like that?

Robert venneri said:

Any idea what this is
It happened last year too
Plants look good till bud time then start doing this

Click to expand...

Some new pics with pics of the whole plant might help.

Robert venneri said:

Any idea what this is
It happened last year too
Plants look good till bud time then start doing this

Click to expand...

Are these outdoors or indoors?

Ganja.Queen said:

Are these outdoors or indoors?

Click to expand...

Outdoor

I don't believe it's fusarium wilt because it starts from the stem base and this appears to be on the new growth.

Without seeing the whole plant, I will say new growth dying can be an indicator of Calcium deficiency. I'm not sure which Coast of Maine soil you're using but Jacks 20-20-20 doesn't have any calcium and cannabis is a calcium hungry plant. You didn't mention cal/mag in your nutes and it's a common deficiency...so I think it's a good chance it could be that.

An easy test is to foliar spray cal/mag and within a week you should notice a change in the dying off of your new growth. Then you'll know if that was it and you should start adding it to your nutes.