Watering gives great results
Ensure that drippers are directly beside the plant and inside the carton.
Use contractors when the group runs out of oomph!
Using our own Daisy layout dripping system works well. This is a fat feeder stem leading to a large central ring and thinner tubes for the petals (100m and 200m tube lengths).
The Winery just across the road has been wonderful allowing us many tankers of water.