How to add trees that i cant walk through? Fast Response Please

Hopefully im more clear this time around… so i place a tree in the level right, and i hit play and walk up to the tree and i go through it… i figured out the collision and hit save so the i put the tree into the foliage painter thingy where i can place multiple down at once and i can walk through it, its there anyway to fix that and or a fast way to place trees that have collision?

Set Collision Preset of the tree instances in foliage tool to Block All.

Thanks so much!!