For a deep condition, try this DIY Avocado and Banana Hair mask.
1 ripe banana
1 ripe avocado
1 tablespoon of olive oil
A few drops of your favorite essential oil, such as lavender, rose, sweet orange or jasmine
Blend the ripe banana and ripe avocado together in a mixing bowl. Make sure it forms a smooth paste without any lumps. Next, add in olive oil and 2-3 drops of your essential oil and stir altogether.
Damp your hair with water, and apply the mask onto hair (including scalp if you want). Massage the mixture, clip your hair onto the top of your head, and then cover with a shower cap. Allow the mixture to sit for about 15 minutes or longer if you prefer.
Remove the shower cap and rinse your hair thoroughly to remove the mask entirely. Wash and condition your hair as usual.