After registering on the website you will have access to a host of downloadable resources. They generally come in PDF, MS Word or Power Point format. Covering a wide range of topics, and covering both KS1 and KS2 this is a huge teaching resource that could save you a lot of time.
This website offers a lot of resources for anyone looking to teach about plants including growing seeds in a bag, and Life cycle of a plant. There are documents to download in PDF and ZIP format. These are all free and you don’t need to sign up.