Sowing carrots and starting dahlias

Last year my friend grew the most amazing purple carrots in her raised bed. Feeling inspired, I have decided to give them a go in our raised bed. We are trying an F1 variety called "Purple Sun".  The soil in the raised bed is primarily from shop-bought compost so I am hoping there will be minimal forking. The bug-proof cover should also keep out the carrot root fly.
We have also started some dahlia tubers off in pots in the greenhouse:

To my relief the tomatoes are germinating in their pots:

The zinnias are in the tray. The chillis are still struggling to germinate. So far we have 2 "Chilli Shake" (out of 6) and 3 "Cascabella" out of 7).