Shading the greenhouse

Put simply, if you don't shade the greenhouse, you will be severely limited in the things you can grow in it. Most annuals and potted flowering plants will bleach and scorch. Vegetables and fruits will overheat and rot. Compost in pots will cook a plant's roots. You should be OK with succulents and cacti, however. Paint on Coolglass shading, or erect green shade netting now.