Hey mate ;looks more like a root problem ; when some roots die ;corresponding parts on plant die prematurely without sense. This happened to me when i used a clay like soil. Also hold back on your watering. Let the pot dry out before every feeding. Its like making roots stretch out to find water and inturn grow bigger and healther. Also always check ph. More acidic ph with clay like soil can lead to root rot and thus dying of those leaves.
Thank you guys! I'll keep your tips in mind! ;)
The soil is a mixture of 'normal' flower soil and coco soil. Some people told me it's a good combo so I just followed their words hahah.
Looks like it's not getting much light where it's at. Do you rotate your plants nightly? This should help that not happen if your light isn't right above your plant. Happy Growing! 👊