Seedlings can stretch very quickly leading to poor quality plugs. Trimming plugs does not work well. An A-rest spray on the seed at sowing can reduce initial stretch. Post germination, B9/Cycocel is useful. Sumagic can also be used but can lead to hard, stunted plugs. Plugs and containers should be grown above 68F ADT or crop times will be much longer and cultural issues can arise.