diff --git a/src/modules/stream/ui/grow_job.cpp b/src/modules/stream/ui/grow_job.cpp
index b94194b..e0904fc 100644
--- a/src/modules/stream/ui/grow_job.cpp
+++ b/src/modules/stream/ui/grow_job.cpp
@@ -473,22 +473,14 @@ void grow_job_queue::iterate()
 {
 	assert(grid_e.is_valid());
 	assert(this);
+	/* once for each grid floor */
 	flecs::query<growth_regions> q =
 		grid_e.world().query_builder<growth_regions>().build();
-#if 0
-	flecs::query<region_tree> qm =
-		grid_e.world().query_builder<region_tree>().build();
-#endif
 	q.each([this](flecs::entity e, growth_regions &g) {
 		flecs::log::warn("pre floor: %s", e.path().c_str());
 	});
-#if 0
-	qm.each([this](flecs::entity em, region_tree &rt) {
-		rt.dump(em);
-		assert(rt.check(em));
-	});
-#endif
 	q.each([this](flecs::entity e, growth_regions &g) {
+		struct region_tree *rtree = e.get_mut<region_tree>();
 		flecs::log::warn("floor: %s", e.path().c_str());
 		flecs::log::warn("job count: %d", g.job_list.size());
 		while (!g.job_list.empty()) {
@@ -544,17 +536,17 @@ void grow_job_queue::iterate()
 		flecs::log::dbg(
 			"processed jobs (created region initial positions): %d",
 			g.job_list.size());
+		assert(rtree->check(e));
+		rtree->shrink_rooms(e);
+		rtree->place(e);
+		e.modified<region_tree>();
 		g.job_list.clear();
-		flecs::query<region_tree> qm =
-			grid_e.world().query_builder<region_tree>().build();
-		qm.each([this](flecs::entity em, region_tree &rt) {
-			assert(rt.check(em));
-		});
-		qm.each([this](flecs::entity em, region_tree &rt) {
-			rt.shrink_rooms(em);
-		});
-		qm.each([this](flecs::entity em, region_tree &rt) {
-			rt.place(em);
-		});
 	});
-}
\ No newline at end of file
+}
+
+void grow_job_queue::finalize()
+{
+	flecs::query<growth_regions> q =
+		grid_e.world().query_builder<growth_regions>().build();
+	q.each([this](flecs::entity e, growth_regions &g) {});
+}
diff --git a/src/modules/stream/ui/grow_job.h b/src/modules/stream/ui/grow_job.h
index a0f3ccb..e50d0fc 100644
--- a/src/modules/stream/ui/grow_job.h
+++ b/src/modules/stream/ui/grow_job.h
@@ -20,6 +20,7 @@ struct grow_job_queue {
 		const WorldEditor::components::buildings_layout_grid_size &size,
 		const String &module_name);
 	void iterate();
+	void finalize();
 	void job_initial(struct grow_job *job);
 	void job_common(struct grow_job *job);
 	void commit_common_queue();
diff --git a/src/modules/stream/ui/growth_module.cpp b/src/modules/stream/ui/growth_module.cpp
index 3ed4b97..60f47bb 100644
--- a/src/modules/stream/ui/growth_module.cpp
+++ b/src/modules/stream/ui/growth_module.cpp
@@ -9,6 +9,7 @@
 
 growth_module::growth_module(flecs::world &ecs)
 {
+	grow_count = 0;
 	ecs.module<growth_module>();
 	ecs.component<growth_regions>();
 	ecs.component<region_tree>();
@@ -44,7 +45,9 @@ growth_module::growth_module(flecs::world &ecs)
 		.write<growth_regions>()
 		.kind(GraphSolve)
 		.run([module_name, this, GraphFilter](flecs::iter &it) {
+			flecs::log::dbg("RunGrow");
 			flecs::world &&ecs_ = it.world();
+			assert(grow_count == 0);
 			it.world().defer_suspend();
 			flecs::log::dbg("Assembling skeleton done...");
 			flecs::entity GraphSolveZones = it.world().lookup(
@@ -89,6 +92,7 @@ growth_module::growth_module(flecs::world &ecs)
 						grid_e, subregions, size,
 						module_name);
 					job_queue.iterate();
+					job_queue.finalize();
 				});
 			commit_growth_queue(it.world());
 			mark_cells(it.world());
@@ -97,6 +101,7 @@ growth_module::growth_module(flecs::world &ecs)
 				.lookup("::growth_module::GraphFilter")
 				.disable();
 			it.world().defer_resume();
+			grow_count++;
 		});
 }
 
diff --git a/src/modules/stream/ui/growth_module.h b/src/modules/stream/ui/growth_module.h
index 81813c2..4aba7c5 100644
--- a/src/modules/stream/ui/growth_module.h
+++ b/src/modules/stream/ui/growth_module.h
@@ -4,6 +4,7 @@
 #include "base_data.h"
 
 struct growth_module {
+	int grow_count;
 	void grow_cell(flecs::entity seed_e, int id);
 	void commit_growth_queue(flecs::world &&world);
 	void mark_cells(flecs::world &&ecs_);