Aphids on sunflower bud

Found a few aphids on one of my sunflower buds and killed them but there are a couple hiding in the folds of the bud and I suspect there might be a few more that I cannot see. Is this a cause for concern (yet)? Looked up options ranging from dish soap solutions to ladybirds but uncertain about effectiveness and… if buying a whole bottle of pesticide or 100 ladybird eggs is overboard for… a max of three plants with a few pests.

Any advice?