diff --git a/src/content_mapnode.cpp b/src/content_mapnode.cpp
index c982f12..11e1c85 100644
--- a/src/content_mapnode.cpp
+++ b/src/content_mapnode.cpp
@@ -1369,7 +1369,6 @@ void content_mapnode_init()
 	f->description = std::string("Sponge");
 	f->setAllTextures("sponge.png");
 	f->setInventoryTextureCube("sponge.png", "sponge.png", "sponge.png");
-	f->param_type = CPT_MINERAL;
 	f->draw_type = CDT_CUBELIKE;
 	f->is_ground_content = true;
 	f->dug_item = std::string("MaterialItem2 ")+itos(i)+" 1";
@@ -1381,7 +1380,6 @@ void content_mapnode_init()
 	f->description = std::string("Waterlogged Sponge");
 	f->setAllTextures("sponge_full.png");
 	f->setInventoryTextureCube("sponge_full.png", "sponge_full.png", "sponge_full.png");
-	f->param_type = CPT_MINERAL;
 	f->draw_type = CDT_CUBELIKE;
 	f->is_ground_content = true;
 	f->dug_item = std::string("MaterialItem2 ")+itos(i)+" 1";
diff --git a/src/content_mapnode.h b/src/content_mapnode.h
index 23effe3..d9741af 100644
--- a/src/content_mapnode.h
+++ b/src/content_mapnode.h
@@ -255,6 +255,7 @@ MapNode mapnode_translate_to_internal(MapNode n_from, u8 version);
 #define CONTENT_SILVER 0x8C3
 #define CONTENT_GOLD 0x8C4
 #define CONTENT_QUARTZ 0x8C5
+// fire and tnt
 #define CONTENT_FIRE 0x8C6
 #define CONTENT_FIRE_SHORTTERM 0x8C7
 #define CONTENT_TNT 0x8C8
diff --git a/src/environment.cpp b/src/environment.cpp
index 915138a..972857a 100644
--- a/src/environment.cpp
+++ b/src/environment.cpp
@@ -1103,8 +1103,8 @@ void ServerEnvironment::step(float dtime)
 				*/
 				if (n.getContent() == CONTENT_GRASS)
 				{
-					int f = (10000-(p.Y*2))+10;
-					if (p.Y > 2 && myrand()%f == 0) {
+					int f = (1000-(p.Y*2))+10;
+					if (p.Y > 1 && myrand()%f == 0) {
 						MapNode n_top = m_map->getNodeNoEx(p+v3s16(0,1,0));
 						if (n_top.getContent() == CONTENT_AIR && n_top.getLightBlend(getDayNightRatio()) >= 13) {
 							v3f pp;
@@ -1112,9 +1112,27 @@ void ServerEnvironment::step(float dtime)
 							pp.Y = p.Y;
 							pp.Z = p.Z;
 							Player *nearest = getNearestConnectedPlayer(pp);
-							if (nearest == NULL || nearest->getPosition().getDistanceFrom(pp*BS)/BS > 10.0) {
-								n_top.setContent(CONTENT_WILDGRASS_SHORT);
-								m_map->addNodeWithEvent(p+v3s16(0,1,0), n_top);
+							if (nearest == NULL || nearest->getPosition().getDistanceFrom(pp*BS)/BS > 20.0) {
+								bool can_grow = true;
+								for(s16 x=-1; can_grow && x<=1; x++)
+								for(s16 y=-1; can_grow && y<=1; y++)
+								for(s16 z=-1; can_grow && z<=1; z++)
+								{
+									MapNode n_test = m_map->getNodeNoEx(p+v3s16(x,y,z));
+									if (
+										n_test.getContent() == CONTENT_WILDGRASS_SHORT
+										|| n_test.getContent() == CONTENT_WILDGRASS_LONG
+										|| n_test.getContent() == CONTENT_FLOWER_STEM
+										|| n_test.getContent() == CONTENT_FLOWER_ROSE
+										|| n_test.getContent() == CONTENT_FLOWER_TULIP
+										|| n_test.getContent() == CONTENT_FLOWER_DAFFODIL
+									)
+										can_grow = false;
+								}
+								if (can_grow) {
+									n_top.setContent(CONTENT_WILDGRASS_SHORT);
+									m_map->addNodeWithEvent(p+v3s16(0,1,0), n_top);
+								}
 							}
 						}
 					}
@@ -1153,7 +1171,7 @@ void ServerEnvironment::step(float dtime)
 				{
 					MapNode n_btm = m_map->getNodeNoEx(p+v3s16(0,-1,0));
 					if (n_btm.getContent() == CONTENT_GRASS || n_btm.getContent() == CONTENT_MUD) {
-						if (p.Y > -1 && myrand()%200 == 0) {
+						if (p.Y > -1 && myrand()%100 == 0) {
 							MapNode n_top = m_map->getNodeNoEx(p+v3s16(0,1,0));
 							if ((n_btm.getContent() == CONTENT_GRASS || n_btm.getContent() == CONTENT_FLOWER_POT) && n_top.getLightBlend(getDayNightRatio()) >= 13) {
 								switch (myrand()%3) {
@@ -1613,7 +1631,7 @@ void ServerEnvironment::step(float dtime)
 							p.Y < -30
 							&& n_top1.getContent() == CONTENT_WATERSOURCE
 							&& n_top2.getContent() == CONTENT_WATERSOURCE
-							//&& myrand()%5000 == 0
+							&& myrand()%50 == 0
 						) {
 							n_top1.setContent(CONTENT_SPONGE_FULL);
 							m_map->addNodeWithEvent(p+v3s16(0,1,0), n_top1);
diff --git a/src/server.cpp b/src/server.cpp
index 654b516..3aafd92 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -2409,7 +2409,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 				if ((n.getContent()&CONTENT_DOOR_SECT_MASK) == CONTENT_DOOR_SECT_MASK)
 					mp.Y = -1;
 
-				MapNode m = m_env.getMap().getNode(p_under+mp);
+				MapNode m = m_env.getMap().getNodeNoEx(p_under+mp);
 				core::list<u16> far_players;
 				if ((n.getContent()&CONTENT_HATCH_MASK) != CONTENT_HATCH_MASK) {
 					if ((n.getContent()&CONTENT_DOOR_OPEN_MASK) == CONTENT_DOOR_OPEN_MASK) {
@@ -2662,7 +2662,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 			}
 			if (is_farm_swap)
 			{
-				MapNode n = m_env.getMap().getNode(p_under);
+				MapNode n = m_env.getMap().getNodeNoEx(p_under);
 				n.setContent(CONTENT_FARM_DIRT);
 
 				actionstream<<player->getName()<<" ploughs "<<PP(p_under)
@@ -2705,7 +2705,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 						<<(int)mineral<<std::endl;
 
 				core::list<u16> far_players;
-				MapNode n = m_env.getMap().getNode(p_under);
+				MapNode n = m_env.getMap().getNodeNoEx(p_under);
 				if (
 					n.getContent() >= CONTENT_DOOR_MIN
 					&& n.getContent() <= CONTENT_DOOR_MAX
@@ -2727,7 +2727,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 					sendRemoveNode(p_under, 0, &far_players, 30);
 				}else{
 					if (n.getContent() == CONTENT_FLOWER_POT) {
-						MapNode a = m_env.getMap().getNode(p_under+v3s16(0,1,0));
+						MapNode a = m_env.getMap().getNodeNoEx(p_under+v3s16(0,1,0));
 						if (
 							a.getContent() == CONTENT_FLOWER_ROSE
 							|| a.getContent() == CONTENT_FLOWER_DAFFODIL
@@ -2743,7 +2743,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 							}
 						}
 					}
-					MapNode a = m_env.getMap().getNode(p_under+v3s16(0,1,0));
+					MapNode a = m_env.getMap().getNodeNoEx(p_under+v3s16(0,1,0));
 					if (a.getContent() == CONTENT_FIRE) {
 						sendRemoveNode(p_under+v3s16(0,1,0), 0, &far_players, 30);
 						{
@@ -2848,7 +2848,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 								|| wieldname == std::string("TinBucket")
 							)
 						) {
-							MapNode n = m_env.getMap().getNode(p_under);
+							MapNode n = m_env.getMap().getNodeNoEx(p_under);
 							n.setContent(CONTENT_SPONGE);
 
 							core::list<u16> far_players;