From ef8b7e230d17b424749e0ce428720afa7ac4fe6d Mon Sep 17 00:00:00 2001
From: paramat <mat.gregory@virginmedia.com>
Date: Fri, 16 Oct 2015 11:51:27 +0100
Subject: [PATCH] Default/trees: Add requirement of light level 13 for sapling
 growth

---
 mods/default/trees.lua | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mods/default/trees.lua b/mods/default/trees.lua
index 07cc4d73..5f50b040 100644
--- a/mods/default/trees.lua
+++ b/mods/default/trees.lua
@@ -16,6 +16,10 @@ local function can_grow(pos)
 	if is_soil == 0 then
 		return false
 	end
+	local ll = minetest.get_node_light(pos)
+	if not ll or ll < 13 then -- Minimum light level for growth
+		return false          -- matches grass, wheat and cotton
+	end
 	return true
 end