I recently transplanted a small robusta (approx 90cm in height, including fronds) and when i was digging it up, i did not leave any soil on the roots, so there was barely a root ball - just the roots, bascically. I planted it in the soil in my backyard and watered it etc. I am wondering how crucial it is to have a root ball when transplanting because i am worried that it will die. How likely is it that the tree survives if i take good care of it? Any tips on maintaining it in a healthy condition would be much appreciated. Thank YOU!
Palms have compact roots anyway making it possible to move quite large ones with success. If your climate is now entering or about to enter a long hot season maybe keeping them mulched and watered will be the main requirements, perhaps staked as well. Pretty hard for anyone not seeing the plants during the operation to make predictions of success.