To me it looks like she is short on nitrogen, so maybe buy some nutes for that, or if u also grow organic u could ferment some stinging nettles in rainwater and then put that with 10 times the amount of water and introduce that in your waterscheme 1 every 3 times. Also usable as foliar spray but then i would recommend 1liter nettles tea on 20 to 30 liters of water.