I do use plastic pot and trays but never new ones. Most of my plastic is hand me down from dear deceased mama who died 11 years ago and are still in perfect condition (the pots, not mama ?) . I recycle water, everything compostible is composted, and if I can reuse I do. I try to minimise travel even in non lockdown and try to make every mile count. We have solar panels to supplement our energy. I clothes shop in charity shops. My gardening shoes, until recently, were my lad's school shoes (he's now 32!). I'm sure there are always going to be more ways to become greener, even when you think you've done all you can.
Gardening is an excuse not to do housework
Greetings from Salisbury
Qualified member of the Confused Nutter's Club