Mozs outdoor uk

Looks like calcium to me. As you are growing in soil I would add in some chicken manure if it was me or brew up an egg shell extract. You can also use some ready to use CaMg supplements as a quick fix. Your PH is on the high side for soil based grow as well, I would try and get that down a notch to 6.4 if possible given that its in a pot vs the earth. Also side note a lot of things say potting soil but in reality it is soilless as it contain little to no soil. Please double check your bag if it comes from one and confirm it is not just peat and perlite or something like that. Good Luck & Happy Growing. **disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details:** growdiaries.com/giveaways/GotM-August-2022