Usually that only occurs when a plant has undergone some sort of stress or has re-vegged. I'm assuming when you say "OD" you mean outdoor, which can wreak havoc on younger plants due to extreme weather fluctuations. That being said, it doesn't mean they won't develop decent bud. I had 2 plants this season that re-vegged back in June from heat stress with tons of single, double, and 3 leaf growth and I still got some beautiful bud from it. How is the overall health of the plants?