Answer:lantana. Lantana loves heat and generally doesn't put out any new growth until the temperatures reach 80F. You didn't mention where you live, but unless it's in the southwest desert, the weather may not have warmed up enough for your lantana. Lantana is drought tolerant. You can water your plants twice a week in the summer and if you have drip irrigation, 30 minutes per session with a half-gallon emitter should do it.
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