There are many household items that you could recycle for use in your garden. Here are some:
They include cardboard centres from kithen and toilet rolls as plant pots. You can see when they dry out quite easily. Plastic containers with lids can also be used as plant pots and come with their own trays and also propogators..
Food trays can be used as trays for larger pot plants.
These cardbord tubes have a good root run and there are 29 in this tray of Ricinus. Sown 24 Feb 19.
Then early April 2019