Vegetables,Fruits,Nuts, ETC.
I think they will grow petter alone if they are not planted in the same pot. The one plant will absorb more nutrients from the soil it is planted in rather than if it was planted with another.
The population changed the way it did because the mutation allowed the mutated animals to better survive in their environment compared to the normal species. Their size made them capable of getting food from higher branches that the normal species couldn't reach. THE ANSWER WAS ON GOOGLE