diff --git a/assays/complementation_crosses/protocols/crossing_plants.md b/assays/complementation_crosses/protocols/crossing_plants.md
index b090a5eaae8dcffaacb3650b63cc5c1021045968..59222e7927c797078be387fcfa9d618554f9e6b8 100644
--- a/assays/complementation_crosses/protocols/crossing_plants.md
+++ b/assays/complementation_crosses/protocols/crossing_plants.md
@@ -1,9 +1,10 @@
-**crossing of plants**
+## Crossing of plants
 
+**Growth:**
 - grow parent plants in LD conditions
 - if parental plants have very different flowering times: sow the faster one with a bit of delay)
 
-
+**Crossing:**
 - emasculate florets from mother plants before pollen are shed (about Waddington stage 8.5 - 9.0)
 - pollinate florets with pollen from father plants, pollinate all florets from one spike with the same father: this is one cross
 - cover the spike with a paper bag, count later how many of the pollinated florets develop into seeds