Hi
@JazzyJay! This looks like a Phosphorus (P) deficiency. She's in early flowering stage and needs Phosphorus for the bud-sites to expand. Since your pH seems fine, my bet is that your nutrient routine does not contain enough P. You should slowly switch to blooming nutrients, while giving her a bit of Nitrogen (N) during the stretch, then only P + K until the final flush. Hope this will help, keep us up-to-date and happy growing 👊