Rust spots on leaves?

The plant is growing great its about week 5 into flowering, under about 450w of cfls. Only problem are these spots: . Appreciate any feedback! More pics of the plant: Its Barneys Farm Tangerine Dream.

You want to give any details?
That is K deficiency, but until you tell us what you are doing and giving to your plant, we can't tell you why.
Looks to me like you are a few weeks out, plenty of time to feed if need be.

Yeah, sorry I was in a hurry posting this. Im using fox farms tigerbloom and I had to go with mg soil. I'm not really feeding as much tiger bloom because of the mg soil maybe that's the problem? Oh and I feed 1 1/2 tsp every two waterings.

BBN8 said:

Yeah, sorry I was in a hurry posting this. Im using fox farms tigerbloom and I had to go with mg soil. I'm not really feeding as much tiger bloom because of the mg soil maybe that's the problem? Oh and I feed 1 1/2 tsp every two waterings.

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I wasn't trying to be a dick man, just that you didn't give us much info to base an answer on.
IME, be careful with the FF nutes, as for me, they seem to drop my PH more than other brands, and that can give you a lockout.
I have used MG Moisture control with about 35-40% MG Perlite mixed in for 3 yrs now, and even germ in it with no problems.
I usually don't start feeding until about 22-25 days, also about the time I move from the Solo cup to a 1 gal. or larger pot.
Do you have any drops or any way to check your PH?
All I do, is check my tap PH once in a while, and knowing it comes out around 7.9 except for Summer, when it;s a little higher, I add 3 drops per gal. of PH down unless I'm giving FF nutes, and I'm good to go.
**Matbe I should rephrase........
I always give 3 drops PH down unless I'm giving FF nutes.
I do NOT add Lime when I make my soil mix.

, starting to look worse although the buds are still growing fine. It's starting to worry me being so close to harvest. Its finishing up about week 6 or 7. The ph has never been a problem before, but I also have no way to check it right now due to losing my tester. I can get another next week.