Things to do in the Greenhouse...
Greenhouses can get very hot very quickly in Spring sunshine and so you may want to think about putting up some shading.
Give pots of amaryllis a high potash fertiliser like Tomorite and start to prick out seddlings that have germinated.
If you brought fuchsias and pelargoniums in over the winter now is a good time to start watering them again to start growth.