diff --git a/buildings/building.gd b/buildings/building.gd
index a1cc5d1..58e5d6d 100644
--- a/buildings/building.gd
+++ b/buildings/building.gd
@@ -17,15 +17,14 @@ func _ready() -> void:
 	
 	await get_tree().create_timer(0.2).timeout
 	if get_node_or_null("ObjectList") != null:
-		var objects_to_be_placed = $ObjectList.get_children()
-		$ObjectList.reparent(get_tree().get_root().get_node("main"), false)
+		var obj_list = $ObjectList
+		obj_list.reparent(get_tree().get_root().get_node("main"), false)
+		await get_tree().create_timer(0.2).timeout
+		var objects_to_be_placed = obj_list.get_children()
 		for object in objects_to_be_placed:
 			var offset = object.global_position;
 			object.global_position = Grid.get_world_position(location, offset)
-			# some objects, such as petals, require information about their position in the grid.
-			if "location" in object: object.location = Grid.get_location_from_world_pos(object.global_position)
-			if "offset" in object: 
-				object.offset = Global.vec_mod(offset, 300)
+			
 			# The building remembers these objects: If it is destroyed, so are they.
 			if object is Platform or object is Trap or object is Item:
 				objects.append(object)
@@ -33,6 +32,14 @@ func _ready() -> void:
 			# This scales platforms hoizontally to make sure they still form a floor without gaps.
 			if(object.has_method("init_at_horizontal_distortion")):
 				object.init_at_horizontal_distortion(object.position.length() / Grid.ground_radius)
+			grid_entrance_callback(object)
+
+func grid_entrance_callback(object : Node):
+	# Objects receive a callback when placed, starting from the deepest children
+	for child in object.get_children():
+		grid_entrance_callback(child)
+	if object.has_method("_enter_grid"):
+		object.call_deferred("_enter_grid")
 
 func overlaps(other : Building):
 	# heights don't overlap
diff --git a/items/generic/item_spawn.gd b/items/generic/item_spawn.gd
index 323f508..1d59d75 100644
--- a/items/generic/item_spawn.gd
+++ b/items/generic/item_spawn.gd
@@ -10,8 +10,10 @@ static var item_pool = ResourceLoader.load("res://items/generic/item_pool.tres",
 @export var unique_bonus_multiplier = .05
 @export var rare_bonus_multiplier = 0
 
-@export var spawn_petal = false
-@export var petal_scene : PackedScene = ResourceLoader.load("res://petal.tscn")
+@export var spawn_petal = true
+@export var petal_scene : PackedScene = ResourceLoader.load("res://vines_petals/petal.tscn")
+
+var packed_item_scene : PackedScene
 
 var remove_after_spawn = false
 
@@ -42,12 +44,13 @@ func _ready():
 	# Pick a random pool and a random item from it, then remove it if unique.
 	var pool = choose_pool()
 	var index = randi_range(0, pool.size() - 1)
-	var packed_scene : PackedScene = pool[index]
+	packed_item_scene = pool[index]
 	if remove_after_spawn:
 		item_pool.unique.remove_at(index)
-		
+	
 	# Place the item, possibly inside a petal
-	var object = packed_scene.instantiate()
+	if packed_item_scene == null: return
+	var object = packed_item_scene.instantiate()
 	add_child.call_deferred(object)
 	object.reparent.call_deferred(get_parent())
 	if spawn_petal: instantiate_petal(object)
diff --git a/items/generic/item_spawn.tscn b/items/generic/item_spawn.tscn
index 1fd4397..00b76e4 100644
--- a/items/generic/item_spawn.tscn
+++ b/items/generic/item_spawn.tscn
@@ -1,7 +1,7 @@
 [gd_scene load_steps=4 format=3 uid="uid://xj0of571aur1"]
 
 [ext_resource type="Script" uid="uid://b8em61mqgdi58" path="res://items/generic/item_spawn.gd" id="1_ms6tn"]
-[ext_resource type="PackedScene" uid="uid://bhhhvaqhm3ctc" path="res://petal.tscn" id="2_5to52"]
+[ext_resource type="PackedScene" uid="uid://bhhhvaqhm3ctc" path="res://vines_petals/petal.tscn" id="2_5to52"]
 [ext_resource type="PackedScene" uid="uid://chs0u61f45nau" path="res://utils/earth_aligner.tscn" id="3_5pwuf"]
 
 [node name="ItemSpawn" type="Node2D"]
diff --git a/player/player.gd b/player/player.gd
index 83032f9..6e34a3a 100644
--- a/player/player.gd
+++ b/player/player.gd
@@ -236,6 +236,6 @@ func play_double_jump_animation() -> void:
 # If there is any vine nearby, gain the corresponding statusses.
 func update_vine_statuses():
 	var location = Grid.get_location_from_world_pos(global_position)
-	for vine : Vine in Grid.vines_per_node[location.x][location.y]:
+	for vine : Vine in Grid.get_vines_at(location):
 		if vine.active_depth > 0: #TODO: Properly manage procedural activation
 			Status.apply(vine.status_name, self, 0.1, vine.status_params)
diff --git a/traps/morning_star.gd b/traps/morning_star.gd
index 43a7e24..ce3913d 100644
--- a/traps/morning_star.gd
+++ b/traps/morning_star.gd
@@ -6,7 +6,7 @@ var enemy_damage = 10
 @onready var dmg_id = Global.next_dmg_id
 var id_refreshing = false
 
-func _ready() -> void:
+func _enter_grid() -> void:
 	# Randomize starting position and rotation direction
 	rotate(randf() * TAU)
 	angular_speed = angular_speed * (2 * randi_range(0,1) - 1)
diff --git a/utils/earth_aligner.gd b/utils/earth_aligner.gd
index fb3f54a..5bc7312 100644
--- a/utils/earth_aligner.gd
+++ b/utils/earth_aligner.gd
@@ -17,7 +17,7 @@ var left : Vector2 :
 	get():
 		return global_from_local(Vector2.LEFT)
 
-func _ready() -> void:
+func _enter_grid() -> void:
 	align()
 
 func _process(_delta: float) -> void:
diff --git a/utils/global.gd b/utils/global.gd
index a74e000..fc1526d 100644
--- a/utils/global.gd
+++ b/utils/global.gd
@@ -7,5 +7,7 @@ static var next_dmg_id : int = 0 :
 		return next_dmg_id
 
 # Entrywise modulo
-static func vec_mod(vec : Vector2, modulus : float):
-	return Vector2(fposmod(vec.x, modulus), fposmod(vec.y, modulus))
+static func vec_mod(vec : Vector2, modulus : float, only_x = false, only_y = false):
+	return Vector2(
+		fposmod(vec.x, modulus) if not only_y else vec.x, 
+		fposmod(vec.y, modulus) if not only_x else vec.y)
diff --git a/vines_petals/bud.gd b/vines_petals/bud.gd
index 5c31f3c..db9a246 100644
--- a/vines_petals/bud.gd
+++ b/vines_petals/bud.gd
@@ -1,7 +1,6 @@
 class_name Bud extends VineNode
 signal opened
 var img_path
-@export var depth : int
 
 # Triggers when a bud is hit. Spreads the vine, then removes the bud
 func _on_opened():
@@ -14,14 +13,11 @@ func _on_opened():
 # Spread in all directions where the given vine is not yet present
 func spread():
 	for dir in [Vector2.UP, Vector2.DOWN, Vector2.RIGHT, Vector2.LEFT]:
-		if not vine.vine_locations.has(Global.vec_mod(location + dir, Grid.num_collumns)):
+		if not vine.vine_locations.has(Global.vec_mod(location + dir, Grid.num_collumns, true)):
 			grow_to_next_bud(dir)
 
 # Grow a vine
 func grow_to_next_bud(dir):
-	var target_offset = vine.random_offset()
-	var target = Global.vec_mod(location + dir, Grid.num_collumns)
-	var pos1 = Grid.get_world_position(location, offset)
-	var pos2 = Grid.get_world_position(target, target_offset)
-	var num_seg = floor((pos1-pos2).length() / 96)
-	await vine.grow_vine_sequence(location, offset, target, target_offset, num_seg, depth, true, false)
+	var target_location = Global.vec_mod(location + dir, Grid.num_collumns, true)
+	var target = vine.random_vine_node_at(target_location)
+	await vine.grow_vine_sequence(self, target, true, false)
diff --git a/petal.gd b/vines_petals/petal.gd
similarity index 52%
rename from petal.gd
rename to vines_petals/petal.gd
index 71e9c8f..f83b23d 100644
--- a/petal.gd
+++ b/vines_petals/petal.gd
@@ -1,9 +1,8 @@
-class_name Petal extends Node2D
-@onready var location : Vector2 = Grid.get_location_from_world_pos(global_position)
-@onready var offset : Vector2 = Grid.get_offset_from_world_pos(global_position)
+class_name Petal extends VineNode
 @export var vine_resource : PackedScene
-var vine : Vine
 var activated = false
+
+# Adding an item here automatically locks it inside the petal
 var item : Item:
 	set(item_in):
 		item = item_in
@@ -12,15 +11,14 @@ var item : Item:
 			item.monitorable = false
 			item.modulate = Color(1,1,1,0.8)
 
-func _ready() -> void:
-	await get_tree().create_timer(1).timeout
+# Upon being placed inside a building, create a vine
+func _enter_grid() -> void:
+	depth = 0
 	vine = vine_resource.instantiate()
-	vine.petal_location = Global.vec_mod(location, Grid.num_collumns)
-	vine.petal_offset = offset
+	vine.petal = self
 	get_parent().call_deferred("add_child",vine)
-	await get_tree().create_timer(1).timeout
-	vine.init_random()
 
+# Upon interaction, release the item and activate the vine
 func _on_interaction() -> void:
 	activated = true
 	vine.activate()
diff --git a/petal.gd.uid b/vines_petals/petal.gd.uid
similarity index 100%
rename from petal.gd.uid
rename to vines_petals/petal.gd.uid
diff --git a/petal.tscn b/vines_petals/petal.tscn
similarity index 97%
rename from petal.tscn
rename to vines_petals/petal.tscn
index b2e6e2a..7972f75 100644
--- a/petal.tscn
+++ b/vines_petals/petal.tscn
@@ -1,7 +1,7 @@
 [gd_scene load_steps=7 format=3 uid="uid://bhhhvaqhm3ctc"]
 
 [ext_resource type="Texture2D" uid="uid://d15c1exwtp7sc" path="res://vines_petals/bud_open.png" id="1_05pvv"]
-[ext_resource type="Script" uid="uid://coi26l4ndnaw0" path="res://petal.gd" id="1_ybtdj"]
+[ext_resource type="Script" uid="uid://coi26l4ndnaw0" path="res://vines_petals/petal.gd" id="1_ybtdj"]
 [ext_resource type="PackedScene" uid="uid://b7o82cdfwuqd1" path="res://vines_petals/vine.tscn" id="2_4btcp"]
 [ext_resource type="PackedScene" uid="uid://ds21d77ruuk4y" path="res://utils/interactable_area.tscn" id="2_ybtdj"]
 [ext_resource type="PackedScene" uid="uid://chs0u61f45nau" path="res://utils/earth_aligner.tscn" id="5_uxqeq"]
diff --git a/vines_petals/vine.gd b/vines_petals/vine.gd
index 03e0648..3153b15 100644
--- a/vines_petals/vine.gd
+++ b/vines_petals/vine.gd
@@ -1,11 +1,16 @@
 class_name Vine extends Node2D
-@export var petal_location : Vector2
-@export var petal_offset : Vector2
+# Grid position data of the petal
+@export var petal : Petal
+
+# Locations and offsets of all vine segments
 @export var vine_locations : Array[Vector2]
 @export var bud_resource : PackedScene
+
+# Paths for vine segment sprites while active/inactive
 var img_path_inactive = "res://vines_petals/vine_inactive.png"
 @export var img_path_active : String
 
+# The table from which to choose a status effect at random, including the corresponding vine color
 const status_data = [
 	{
 		"name": "Slow",
@@ -17,20 +22,25 @@ const status_data = [
 		"params" : {},
 		"img_path": "res://vines_petals/vine_active_purple.png"
 	},]
+
+# The chosen status and its data
 var status_name : String
 var status_params : Dictionary = {}
+
+# To which depths vine segments and nodes are active.
+# When max depth is reached, everything is active from then on.
 var active_depth = -1
 var fully_active = false
+var max_depth = 50
+
+# Array containings lists of sprites, using their depths as index
 var vine_data = []
-var max_depth = 150
+
+# List of "leaf locations" of the vine tree
 var vine_end_data = []
 
-func _ready() -> void:
-	var data : Dictionary = status_data.pick_random()
-	status_name = data.name
-	status_params = data.params if data.has("params") else {}
-	img_path_active = data.img_path
-
+# Places a sprite for a vine segment from pos1 to pos2 at a given depth,
+# which might be activated already, depending on the active depth.
 func draw_vine(pos1 : Vector2, pos2 : Vector2, depth : int):
 	var sprite = Sprite2D.new()
 	get_tree().get_root().get_node("main").add_child(sprite)
@@ -38,6 +48,7 @@ func draw_vine(pos1 : Vector2, pos2 : Vector2, depth : int):
 		sprite.texture = ResourceLoader.load(img_path_active)
 	else:
 		sprite.texture = ResourceLoader.load(img_path_inactive)
+		# If neccessary, extend vine_data to the current depth
 		while depth + 1 > vine_data.size():
 			vine_data.append([])
 		vine_data[depth].append(sprite)
@@ -47,37 +58,47 @@ func draw_vine(pos1 : Vector2, pos2 : Vector2, depth : int):
 	sprite.scale.x = 3
 	sprite.z_index = -1
 
-func grow_vine_sequence(location1 : Vector2, offset1 : Vector2, location2: Vector2, offset2 : Vector2, num_segments: int, depth: int, grow_bud = false, quick_spawn = false):
-	depth = min(depth, max_depth)
-	var pos1 = Grid.get_world_position(location1, offset1)
-	var pos2 = Grid.get_world_position(location2, offset2)
-	var positions = []
-	positions.append(pos1)
+# Grows a sequence of vine segments from grid position 1 to grid position 2, starting at given depth.
+func grow_vine_sequence(start : VineNode, target: VineNode, grow_bud = false, quick_spawn = false):
+	var depth = min(start.depth, max_depth)
 	
-	var segment_length = (pos1 - pos2).length() / num_segments
+	# Calculate the number and length of segments from the distance of source and target
+	var dist = (start.position - target.position).length()
+	var num_segments = floor(dist / 96)
+	var segment_length = dist / num_segments
+	
+	# Build a list of vine segment positions placed horizontally equidistant along the line from the source 
+	# to the target, with vertical offset having controlled 2nd derivative to prevent sharp edges.
+	var positions = []
+	positions.append(start.position)
 	var offsets = generate_random_offsets(num_segments, 0.6 * segment_length)
 	for i in range(num_segments - 1):
 		var t = (i + 1) * 1.0/num_segments
-		var center = t * pos2 + (1 - t) * pos1
-		var offset = offsets[i + 1] * (pos2 - pos1).normalized().rotated(PI/2)
+		var center = t * target.position + (1 - t) * start.position
+		var offset = offsets[i + 1] * (target.position - start.position).normalized().rotated(PI/2)
 		positions.append(center + offset)
-	positions.append(pos2)
+	positions.append(target.position)
+	
+	# Draw vine segments along the positions determined previously.
+	# Do so slowly unless quick_spawn is specified.
 	for i in range(num_segments): 
 		draw_vine(positions[i], positions[i+1], depth + i + 1)
 		if not quick_spawn:
 			await get_tree().create_timer(0.2).timeout
+	
 	if active_depth >= depth + num_segments:
-		if grow_bud and location2.y > 0 and location2.y <= Grid.max_bud_height:
-			spawn_bud(location2, offset2, depth + num_segments)
+		if grow_bud and target.location.y > 0 and target.location.y <= Grid.max_bud_height:
+			spawn_bud(target.location, target.offset, depth + num_segments)
 	else:
-		if location2.y > 0 and location2.y <= Grid.max_bud_height:
+		if target.location.y > 0 and target.location.y <= Grid.max_bud_height:
 			for i in range(vine_end_data.size()):
-				if vine_end_data[i].location == location1:
+				if vine_end_data[i].location == start.location:
 					vine_end_data.remove_at(i)
 					break
-			vine_end_data.append({"location": location2, "offset": offset2, "depth": depth+num_segments})
-	Grid.vines_per_node[location2.x][location2.y].append(self)
-	vine_locations.append(Global.vec_mod(location2, Grid.num_collumns))
+			target.depth = depth + num_segments
+			vine_end_data.append(target)
+	Grid.add_vine_to(self, target.location)
+	vine_locations.append(Global.vec_mod(target.location, Grid.num_collumns, true))
 
 func generate_random_offsets(segment_count, max_second_derivative):
 	var differences = []
@@ -122,26 +143,34 @@ func update_active_depth():
 					spawn_bud(data.location, data.offset, data.depth)
 		update_active_depth()
 
+func _enter_tree() -> void:
+	var data : Dictionary = status_data.pick_random()
+	status_name = data.name
+	status_params = data.params if data.has("params") else {}
+	img_path_active = data.img_path
+	init_random()
+
+func random_vine_node_at(location):
+	var offset = random_offset()
+	return VineNode.new(self, location, offset)
+
 func init_random():
-	Grid.vines_per_node[petal_location.x][petal_location.y].append(self)
-	vine_locations.append(petal_location)
-	vine_end_data.append({"location": petal_location, "offset": petal_offset, "depth": 0})
+	Grid.add_vine_to(self, petal.location)
+	vine_locations.append(petal.location)
+	vine_end_data.append(petal)
 	for i in range(randi_range(2,2)):
 		var end = vine_end_data.pick_random()
 		var branches_count = 0
 		for branch in range(ceil(randf() * 4)):
 			var dir = [Vector2.UP, Vector2.DOWN, Vector2.RIGHT, Vector2.LEFT].pick_random()
-			var target = Global.vec_mod(end.location + dir, Grid.num_collumns)
-			if target.y <= Grid.max_bud_height + 1 and Grid.vines_per_node[target.x][target.y].is_empty():
-				if not (target.y <= 0 or target.y > Grid.max_bud_height):
+			var target_location = Global.vec_mod(end.location + dir, Grid.num_collumns, true)
+			if target_location.y <= Grid.max_bud_height + 1 and Grid.get_vines_at(target_location).is_empty():
+				if not (target_location.y <= 0 or target_location.y > Grid.max_bud_height):
 					branches_count += 1
-				var target_offset = random_offset()
-				var pos1 = Grid.get_world_position(end.location, end.offset)
-				var pos2 = Grid.get_world_position(target, target_offset)
-				var num_seg = floor((pos1-pos2).length() / 96)
-				grow_vine_sequence(end.location, end.offset, target, target_offset, num_seg, end.depth, true, true)
+				var target = random_vine_node_at(target_location)
+				grow_vine_sequence(end, target, true, true)
 		if i==0 and branches_count == 1:
-			vine_end_data.append({"location": petal_location, "offset": petal_offset, "depth": 0})
+			vine_end_data.append(petal)
 
 func random_offset():
 	return Vector2(randf_range(60, 240), randf_range(90, 270))
diff --git a/vines_petals/vine_node.gd b/vines_petals/vine_node.gd
index d3c2a52..a295d91 100644
--- a/vines_petals/vine_node.gd
+++ b/vines_petals/vine_node.gd
@@ -1,8 +1,40 @@
 class_name VineNode extends Node2D
-
+		
 @export var vine : Vine
-@export var location : Vector2
+@export var location : Vector2 :
+	set(new_loc):
+		location = Global.vec_mod(new_loc, Grid.num_collumns, true)
 @export var offset : Vector2
+@export var depth : int
 
-func _ready() -> void:
-	position = Grid.get_world_position(location, offset)
+func _get(property: StringName) -> Variant:
+	if property == "position":
+		update_position()
+		return position
+	if property == "global_position":
+		update_position()
+		return global_position
+	return null
+
+func _set(property: StringName, value: Variant) -> bool:
+	if property == "global_position":
+		location = Grid.get_location_from_world_pos(value)
+		offset = Grid.get_offset_from_world_pos(value)
+		update_position()
+		return true
+	if property == "position":
+		update_position()
+		return false
+	return false
+
+func update_position():
+	global_position = Grid.get_world_position(location, offset)
+
+func _enter_grid() -> void:
+	update_position()
+
+func _init(_vine = null, _location = Vector2.ZERO, _offset = Vector2.ZERO, _depth = 0):
+	vine = _vine
+	location = _location
+	offset = _offset
+	depth = _depth
diff --git a/world/grid.gd b/world/grid.gd
index b39d05c..dcf1abb 100644
--- a/world/grid.gd
+++ b/world/grid.gd
@@ -11,7 +11,7 @@ extends Node2D
 var buildings : Array[Building] = []
 
 var max_bud_height = 8
-var vines_per_node : Array = []
+var vines_per_node : Array
 
 func _ready() -> void:
 	reset()
@@ -75,7 +75,17 @@ func reset():
 		for j in range(max_bud_height + 2):
 			arr.append([])
 		vines_per_node.append(arr)
-	
+
+func get_vines_at(location) -> Array:
+	location = Global.vec_mod(location, num_collumns, true)
+	return vines_per_node[location.x][location.y]
+
+func add_vine_to(vine, location) -> void:
+	if location.y > max_bud_height + 1 or location.y < 0:
+		return
+	location = Global.vec_mod(location, num_collumns, true)
+	vines_per_node[location.x][location.y].append(vine)
+
 # for testing
 #func _ready() -> void:
 	#