diff --git a/src/frontends/wx/wx_frame.cpp b/src/frontends/wx/wx_frame.cpp
index f634542..ce09cf9 100644
--- a/src/frontends/wx/wx_frame.cpp
+++ b/src/frontends/wx/wx_frame.cpp
@@ -160,6 +160,15 @@ EssimFrame::EssimFrame(WxFrontend &fe)
     overview_->SetFont(mono);
     log_->SetFont(mono);
 
+    // Cap each control's minimum so its *content* can't inflate the layout's
+    // minimum size: on GTK a full tree/text reports a large natural size, which
+    // would otherwise eat all the vertical space and freeze the log at its
+    // minimum (it stopped resizing once a script populated the tree). With a
+    // modest min, the sizer proportions govern and content scrolls inside.
+    tree_->SetMinSize(wxSize(260, 120));
+    overview_->SetMinSize(wxSize(260, 120));
+    log_->SetMinSize(wxSize(420, 90));
+
     auto *top = new wxBoxSizer(wxHORIZONTAL);
     top->Add(tree_,     1, wxEXPAND | wxALL, 4);
     top->Add(overview_, 1, wxEXPAND | wxALL, 4);