brinjal plant looking very dull
I am using red soil mix with organic fertilizers and cow dung and neem manure. Where I am wrong?
First, in looking at your picture, I'm wondering if the container is large enough? 5 gallons should be the minimum. This article may give you some information: https://www.gardeningknowhow.com/edible/vegetables/eggplant/container-eggplant-plants.htm
Also, I'm not familiar with red soil mix, but whatever kind of soil mix you use, it should be formulated for container use. It sounds like you're working hard to create a nice fertile and organic environment for your plants. Just make sure that any manure you use has been well composted, otherwise it can burn roots or contribute diseases and pests. And make sure your containers are well drained.