Lantanas root so easily its hardly worth bothering with seeds.Stick cuttings in from now till the autumn while the weather is warm.If three - five cuttings are inserted in a small pot for the next couple of weeks and the potful is moved into a larger pot as soon as they are rooted there should be enough time to have a flowering plant this season.Keep them inside a green house till they are ready.
Later cuttings can be overwintered in the small pot for potting on in spring to make large summer plants next year.Whitefly can be a serious problem on Lantanas rub them off as soon as any are seen.The early stage of the pest looks like a small scale wipe these off if you can.
Hope this is useful, Pete.
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