how do i fix K deficiency

My plant is showing signs of Potassium deficiency, how can i fix this problem organically.

I was thinking of mixing some banana peels in the soil.

Kelp meal, or greensand will work for you. Unsulfured molasses also has potassium, but not sure if its enough alone.

I dont know if the banana will break down fast enough to fix your deficiency..

Bat Guano is a great Potassium source.

Put the banana peels in a blender with a pint of water, blend it, strain the solids off (coffee filter) and water your plant with it