diff --git a/src/tree_gui.cpp b/src/tree_gui.cpp
--- a/src/tree_gui.cpp
+++ b/src/tree_gui.cpp
@@ -168,7 +168,7 @@ public:
 static const NWidgetPart _nested_build_trees_widgets[] = {
 	NWidget(NWID_HORIZONTAL),
 		NWidget(WWT_CLOSEBOX, COLOUR_DARK_GREEN, BTW_CLOSE),
-		NWidget(WWT_CAPTION, COLOUR_DARK_GREEN, BTW_CAPTION), SetMinimalSize(132, 14), SetDataTip(STR_PLANT_TREE_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
+		NWidget(WWT_CAPTION, COLOUR_DARK_GREEN, BTW_CAPTION), SetDataTip(STR_PLANT_TREE_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
 	EndContainer(),
 	NWidget(WWT_PANEL, COLOUR_DARK_GREEN, BTW_BACKGROUND),
 		NWidget(NWID_SPACER), SetMinimalSize(0, 2),