In 0_kalavan_greenhouse_1 there is a spot of floor directly in front of the collard. It appears that one should be able to walk directly up to it and pick the collard. However there is a collision block in that spot and the player must move to the side to grab it. Here is a patch that moves the collision block up once space. In the picture below I marked the offending block in green.
Note: The version of Tiled that I am using made some other changes to the TMX file which I don't think were necessary. Perhaps it's just the newer format.