It works really well, as long as you can keep the plants shaded in this hot sunshine
I do this with curly parsley and the plants last right round the year as I cut out flowering stems in the Spring:
Soak the root ball well and then gently "tear" into two or three (or even four) sections. Plant each one slightly deeper than in the pot and remember it will flop about as theat growth is forced but new growth will be normal