butter/marg tubs for plant sales (Upper Norwood SE19)

hi there. Im growing plants for our Barnmead allotment plant sale in Penge on 24th May. i have some native Kent wildflower seeds which i hope to grow in these type of tubs as mini wildflower meadows. Our plant sale is the only source of money for our allotment society as our rents go direct to the council. The money is saved for projects such as our loo and our new pergola. Thanks