What are these yellow spots?

[PRIMO]

Rik Full strength, no bueno. I'd flush with ph.ed water, last gal. about 25% nutrients.

[Rik]

Thanks for your reply. I was considering doing a flush tonight or tomorrow, as soon as the soil has dried enough. That would help if I was overfeeding, I would assume.

[Rik]

Here are some updated pics from this morning.

[Going2fast]

Looks like the beginning of Nute lockout maybe overfeeding.

[Rik]

Hey guys, just now I was checking my Blue Dream Auto and I found some yellow spots on one leaf and some dark discoloration on a couple new leaves. I searched through the plant problems section of the main page and I didn’t find anything that I thought was a match. Apologies in advance if I just missed it. Can anyone offer any help on what is up with my girl here and what I should do? Thanks!

Grow Details:

Blue Dream Auto from ILGM
Day 26 from sprouting
Topped between 4th and 5th node on day 22
Fox Farm Ocean Forest soil with perlite and mycorrhizae
Fox Farm Dirty Dozen nutes, currently feeding week 3 at full strength
Black Dog LED PhytoMAX-2 600, 615 Watts from the wall
18/6 light schedule
Light is currently 24” from canopy
Always pH adjusting plain water and nutes to around 6.5 to 6.6. The last time I measured runoff was 4 days ago and it was 6.47
Temp are mid-lower 80s during day and around 69 at night
Humidity has been low to mid 40s during the day and mid to upper 50s at night