What could be the cause of these yellowing leaves. They've been yellowing very quickly, started with bottom most leaves and is moving upward. Leaves feel limp, not dry, and fall off with a gentle tug.
What phase are you in?
If you're in the vegetative stage, it's a lack of N. Add growth fertilizer.
If you're in flowering (from the second half), it's something normal and good! The plant absorbs nutrients from the leaves to fatten up your buds!
flowering/blooming add nitrogen it is in vegetable lower nitrogen [N] it is in the late bloom like 3/2 week before harvest leave it is normal for buds to feed from the bottom leaves so they get fat and leaves die/turn yellow in the process
Lower leaves normally go yellow as the plant gets older which is normal. If she is still in veg phase, it could be Nitrogen Deficiency, some Epsom salts will do the trick. Happy growing bud.