A pic would definitely help!Please help. I can't seem to get a conclusive answer anywhere for this issue but you seem like the best person to ask. I have a Northern Lights plant outdoors UK. she's in the early stages of flowering & is around 6ft tall & 4ft wide. I keep finding lots of small yellow spots on leaves, predominantly new growth thst appears very quickly. Over time the dots gradually turn orange then in holes. No sign visible signs of insects anywhere. Also an occasional darkening on the tips of the leaf.
It seems to happen every time I switch her to the fruit & veg mix opposed to veg mix. I switched her back into veg a while back for 2 weeks to see if it helped the problem & it almost completely cleared up. Effecting only 5% of the plant when before to seemed closer to 15%. It would be greatly appreciated if you could reply as I am a serious novice but being said she's a beauty. I would & can send you some pics but don't know how to send them.
Looking forward to hearing from you.
Here's a link for you to upload a pic to the gallery. Once uploaded, use the "camera" icon in the text editor to attach it to a post.
Photo Gallery Guide - How to Resize, Upload & Post Photos
Are you applying any foliar sprays, by any chance? Have you checked the UNDERSIDE of the leaves with a magnifying glass? What brand of nutes are you using? Are you mixing with RO water?