Not Sure if this is an issue or not....

I'm currently growing 3 auto flowers outdoor in the UK. They are all doing good but I just noticed spots on some of my fan leaves on my bubalicious today and the tips of some leaves seem burnt. I have been using pk13/14 the past few days and wondering if I should stop and flush? They are about 4ish weeks into flower so I know leaves are meant to change around this time. Any help greatly appreciated. This is my second grow btw

looks like calcium def to me
are you using rain water ?

Thanks for your reply. I am not I'm using tap water just but I've never had any adverse effects. I just made a very mild milk solution to use as I cant afford any nutes right now! I'll see how she looks in a few days. Should I expect the brown spots to disappear if the problem has been addressed or should I just not notice anymore appearing?

Also the yellowing of the bottom leaves, is that normal? I think I'm about 3/4 weeks out from harvesting so I'm not sure if now is too early for the leaves to be yellowing, or is that due to the calcium also? I appreciate all advice.

the leaves on your plants look like their getting enough N, I would say thats MG def, cal/mag will sort it out, water with tap water until you get the cal/mag, you could get some epsom salts cheaply for the MG 1 table spoon in a gallon of water, tap water has calcium in it

Over watered at one time. You will throw some cal mag deficiencies when you over water. They look great all standing up praying to the sun, so Looks like they are back on track. You will need to feed soon.

I added epsom salts mixed with tap water after I added the milk solution although I don't know how much they absorbed as I only watered them yesterday. I will do the same in a day or two and see how they are looking. Thanks for the advice!

How could you tell they were overwatered once Diabolical? I did once during veg but curious how you knew!

Bc it can take a bit to show over watering signs if it happened just once. Continuous over watering ther would be all curled over and limp looking with lots of yellow crunchy leaves underneath. Its on track now tho.

I wouldn't add milk to your plants in any way, milk rots quickly and will cause bacterial infection