Blackberries are self-fertile, which means pollen from one plant can fertilize the same plant – there’s no need to plant another variety nearby for cross-pollination purposes.
But these berries are not self-pollinating: they require bees and butterflies to help transfer pollen from one flower to another.
Bharat CS is a bio- fertilizer containing mixture of live microbes having Azotobacter(N), Phosphorus bacteria(P), Potassium bacteria(K), which helps in enhancing the soil fertility by fixing atmospheric nitrogen, mobilizing potash, solubilizing phosphate and decomposing organic waste and there by producing plant growth substances.