Pumpkin Tree Grow Mini Pumpkins On A Small Tree! You can't have enough mini pumpkins for Thanksgiving and Halloween holiday decorations, but what a lot of space the plants require, with vines up to ten feet long and a hungry appetite for constant feeding to get a worthwhile yield. Now, you can forget about growing miniature pumpkins the hard way, on sprawling vines that threaten to take up the whole yard. Instead, grow up to fifty on a bush no bigger than a pepper plant. Beautiful orange-red fruits ripen all the same small size. Just sixty days from setting out the plants to harvest. Fruits are 4 inches wide with pronounced ribs. (Capsicum annuum)