Why does cutting off the tip of the main stem ofa plant often result in the plant growing bushier?
By breaking of apical dominance.
The phyto hormone i.e., auxins are produced at the apex of the plants. This hormone is responsible for apical dominance by checking the growth of the lateral branches.. The pruning of apical parts of the plant lead to nullify the effects of apical dominance and results bushy growth of the plants. Thank you