Choose a pot (with drainage holes) that’s no more than ⅓ larger than the root ball of the plant. Gardening with soilless potting mix does not include the use of soil. Finally, it depended upon whether you were growing seedlings or large plants. Yet, most growers try to use a universal mix for the majority of their palms. It's super Use hot, soapy water to wash it and rinse it thoroughly in hot water before allowing it to air dry. weight and composition.