The impatiens seeds are shown in the two small trays in the upper right of the photograph before thinning out. The tray in the bottom right contains begonias. This produced about 140 of the 160 seedlings that were transplanted today.
The impatiens were transplanted into a 40 cell tray and soaked in water rather than top sprayed. There were a few extra large seedlings which were put into a small tray as they were too big to got into one of the cells.
I decided to soak the seed trays after planting rather than top spraying the compost to minimise the amount of spray that lands on the leaves and stems which can lead to damage when the sun is strong and can encourage the growth of fungus. I left the seed trays to soak until the top surface of the compost was moist which ensured the roots were well soaked. Any excess water drained out when the trays were placed on the heated sand bed.