Welcome to NGA, Syd!
Do you find that the pots drain well enough, despite growing in top soil in pots? I like to see some water come out the bottom of the pot a few seconds after I water heavily.
(But I DON'T like water running right through a gap between the soil and the pot - that means that the soil or mix never gets wetted. If you have that problem, you can re-hydrate the root ball by briefly submerging the pot in a large bucket of water.
Often, "soil" in pots will pack down too tight for happy roots, squeezing the air gaps out of the soil so that air can't easily diffuse to the roots. "Soil-less mix" is often better for growing in pots.
If you have an occasion to re-pot them, like going to bigger pots as they grow, you might consider using a faster-draining better-aerated soil-less mix. Or adding grit-sized amendments to the top soil so it drains somewhat faster.
And yet, you have to avoid any abrupt changes in the texture of the soil inside the pot. Rapid large differences in soil texture can prevent water from diffusing from the new mix into the old root ball.
