🌿 Can I Plant Rosemary in Las Vegas, NV?
Temperature conditions are suitable for Rosemary. Highs near 116°F are on the warm side — make sure plants have plenty of water.
Growing Rosemary in Las Vegas
Las Vegas's Zone 9b Mojave Desert climate is defined by extreme summer heat — well above 110°F in July — and mild, pleasant winters. The gardening calendar runs opposite to most of the country: cool-season vegetables thrive October through March, and warm-season crops are best planted in spring (March–May) before the furnace of summer arrives. Drip irrigation and shade cloth are non-negotiable in Las Vegas gardens.
In Las Vegas (last frost around February 15), aim to direct sow or transplant rosemary outside around February — approximately 0 weeks after your last expected frost. Starting seeds indoors 12 weeks before the last frost date gives you a significant head start.
Rosemary thrives between 50°F and 85°F. It tolerates temperatures as low as 28°F, making it a candidate for early spring planting before the last frost date. Expect 80–90 days from transplant to first harvest. Slow from seed. Best transplanted. Drought-tolerant once established.
Frequently Asked Questions
When can I plant rosemary in Las Vegas, NV?
In Las Vegas (last frost around February 15), aim to direct sow or transplant rosemary outside around February — approximately 0 weeks after your last expected frost. For best results, start seeds indoors 12 weeks before that — giving you strong transplants ready to go out at the right time.
What is the USDA hardiness zone for Las Vegas?
Las Vegas, NV is in USDA Plant Hardiness Zone 9b. The last expected spring frost is around February 15, and the first fall frost arrives around December 1. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.
Is it safe to plant rosemary outside in Las Vegas right now?
That depends on the current weather forecast. Rosemary needs temperatures above 28°F (ideally 50–85°F) to thrive. CanIPlant checks your real 7-day forecast and any active frost alerts to give you a live YES, NO, or WAIT answer — just enter your ZIP code.
Can I grow rosemary in Las Vegas 2026?
Yes — Rosemary grows well in Las Vegas, NV. With a Zone 9b climate and a growing season of ~290 days, Las Vegas is well-suited for cool-season crops like rosemary. As a frost-tolerant crop, rosemary can even go out a few weeks before the last frost date.
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