fix compatibility with itemframes for seeds / plantable plants

init.lua

@@ -654,6 +654,13 @@ function farming.place_seed(itemstack, placer, pointed_thing, plantname)
 	local under = minetest.get_node(pt.under)
 	local above = minetest.get_node(pt.above)
 
+
+    -- thanks to w_laenger from minetest irc
+    -- fixes itemframes compatibility
+    if minetest.registered_nodes[under.name].on_rightclick then
+        return minetest.registered_nodes[under.name].on_rightclick(pt.under, under, placer, itemstack, pt) 
+    end
+
 	-- check if pointing at the top of the node
 	if pt.above.y ~= pt.under.y + 1 then
 		return