Q. Is it better to plant lantanas now or wait until Spring? Lantana with spring growth A. Now for most of November is a great time if you can find them. Make sure to amend the soil with good compost and water thoroughly each day for several days in a row and then turn it over to your drip system. Before they start growing next spring, cut them back to about an inch and a half above the soil, fertilize them and give them a good drink.