It's common for growers to use a weakened growth nutrient for this phase but far from ideal. Fledgling plants and cuttings are delicate and have different needs. You cannot beat a dedicated propagation nutrient.
If your growing from cutting we highly recommend using a rooting gel and myst to support your cutting whilst it develops roots. We recommend Clonex Gel and Mist, these will drastically increase your cutting success! If growing from seed you'll need a propagation nutrient, with organic varieties from Root!T or standard varieties from Canna (Start), Dutch Pro (Take Root) or simply a bottle of Formulex.
Root boosters are worth considering with exceptional products from Canna (Rhizotonic) or Atami (RootBastic) available and easy to use.