Growing Marjoram in Zone 10B

Sweet marjoram is oregano’s gentler, more floral cousin — warmer and sweeter, with less bite. Essential in Mediterranean cooking and dried herb blends.

Zone 10B has a very long growing season with mild winters. Many crops can be grown nearly year-round with successive plantings.

Top Growing Tips

• Start indoors 6-8 weeks before last frost — slow from seed
• Pinch back flowers to keep plants producing tender leaves
• Harvest before flowers fully open for most concentrated flavor
• Bring indoors as a perennial houseplant in zones 6 and below
• Use fresh or dried — one of the best herbs for drying

Companion Planting

Good companions: vegetables generally, vegetables and beans

Avoid planting near: Fennel

Harvest Timeline

60-90 days; harvest leaves anytime; best flavor just before bloom

About Zone 10B

USDA Hardiness Zone 10B has an average last spring frost around Jan 15 and first fall frost around Dec 31. All planting dates above are calculated from these frost dates. Your specific location may vary — check with your local extension office for the most accurate dates.