Hello! here you can see this bougainvillea plant which has pink flowers in it, this is a very old plant of mine, the bonsai making video of this plant I have shown to before in my channel if you want you can watch that video on my channel. now I will plant some of my bougainvillea plants here the soil I am using this is my homemade mixed potting soil if the soil is clay soil, then mix 10% river sand and 30% small stone pieces with it. one month later now see the growth of these plants have been started, and also they are started to blooming. but the growth of this old plant isn’t happening properly. the leaves are getting shrink the reason behind it is this plant didn’t get enough nutrition or food from the soil. the main food of these plants is nitrogen, phosphorus, and potassium so we have to use N.P.K types of fertilizers like 20-20-20 or 10-26-26 mixing with 1-liter water in half teaspoon quantity and apply it directly on the root-soil this way we have to apply it at an interval of 15-20 days. and it would be better if you clean some soil from these roots and use some new fertilizers mixed soil on there which I am doing here. after that, you can use N.P.K types of fertilizers if you want. this is cow dunk fertilizer dust some days later you can see many flowers are started to blooming but the other color flowers are not started to blooming yet except the white one. but after seeing the growth of these plants, I guess the other color flowers are also started to blooming soon. you can see the old plant here, new leaves are stated to coming out. but after seeing this plant I think I have to give N.P.K types of fertilizers on the root-soil.