Can We Upgrade Old Seeds/Soil To The Heavensward Standard?

[Callback]

My miner retainer absolutely loves to bring me Grade 3 Thanalan topsoil every single hour (50 min actually) though ^^
With that, I can easily keep my garden (1x8 plot) full and i can still sell some of them without having to farm them myself ^^

and HOW long did it take you to get a retainer from 1-60? (or at least 50 for the soil) It's not a luxury most of us have.