leaf signs

New grower and coming towards 1 week before flowering. 2 plants has these brown spots and yellow looking leaves. Anyone know the reason for this ? How can I fix this ?

Hi guys, I’ve seen many deficiencies in years of growing but never seen anything like this nor I can find any information about it. Basically these plants are the most beautiful and healthiest I’ve ever grown; you can see by its rich green color. Yet somehow I started getting pale spots on...