Since 2019 all Hortico production is in special pots than are made from kerbside recycled plastic AND they are kerbside recyclable. They are mostly a distinctive blue colour but more recently they're being made in grey, brown and green too. We reuse pots when we can and reuse carry trays many many times.
Even the black plastic that isn't recyclabel isn't quite that bad, the reason it's black is because it's been recycled so many times before its now too poor to reuse. Many black plastic pots are made from old tyres.