How to Grow White Dome
Wikimedia Commons
White Dome
Salvia farinacea 'White Dome'
flowerWhite Dome is a compact cultivar of mealy sage featuring pure white flowers densely packed on upright spikes that rise above silvery-green foliage. This heat-loving perennial blooms prolifically from early summer through frost and attracts pollinators while remaining drought-tolerant once established.
When should you plant White Dome in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example White Dome timeline · Pittsburgh, PA (Zone 6b)
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Plant White Dome
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First White Dome blooms
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact White Dome dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-10; grown as annual in colder zones
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Seedling
2-3 weeksTiny seedlings with fine cotyledons and early true leaves appearing silvery-fuzzy
Keep soil consistently moist but not waterlogged. Provide bright light. Bottom heat (70-75°F) aids germination.
Vegetative
4-6 weeksPlants develop bushy growth with silvery-green, narrow lance-shaped leaves; no flowers yet
Pinch tops when 4-6 inches tall to encourage branching. Reduce watering frequency. Move to larger containers or transplant outdoors.
Flowering
8-12 weeks minimum, extending to frostUpright spikes of densely-packed white flowers emerge above foliage; blooms open progressively from bottom to top
Deadhead spent spikes to promote continuous blooming. Reduce nitrogen fertilizer; use balanced or slightly higher phosphorus formulation.
Established
Ongoing through growing seasonMature plant with multiple flowering stems and substantial foliage mass; drought-tolerant and self-sustaining
Water only during extended dry periods. Prune back by one-third in early spring to rejuvenate. Minimal fertilizer needed.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Ensure good air circulation; water at soil level only. Spray with sulfur or neem oil at first sign of white coating on leaves.
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Increase humidity slightly by morning misting. Use insecticidal soap or horticultural oil; repeat every 7-10 days as needed.
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Use yellow sticky traps; spray neem oil or insecticidal soap on undersides of leaves. Hose off with water to reduce populations.
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Spray with strong water stream or apply insecticidal soap. Encourage beneficial insects like ladybugs.
Uses
Garnish & herbal tea
CulinaryEdible white flowers make attractive garnishes for salads, desserts, and beverages. Dried flowers can be steeped as a mild herbal tea with subtle sage notes. [source]
Dried flowers & arrangements
CraftWhite flower spikes dry exceptionally well and retain their color and form for months, making them ideal for dried arrangements, wreaths, and floral crafts. [source]
Pollinator magnet
WildlifeAttracts bees, butterflies, hummingbirds, and other beneficial insects throughout the blooming season, supporting garden ecology and food production. [source]
Low-maintenance ornamental
HouseholdServes as an elegant landscape plant requiring minimal water, fertilizer, or maintenance once established, ideal for xeriscape and pollinator gardens. [source]
Traditional sage benefits
MedicinalAs a Salvia species, shares traditional herbal properties associated with sage, including antioxidant compounds, though typically used ornamentally rather than medicinally. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Deadhead faded flower spikes regularly to extend blooming season. Cut flowers last 7-10 days in a vase; harvest in morning after dew dries. Can be dried for long-lasting arrangements by cutting spikes and hanging upside-down in a warm, dry location.
Fun Facts
- 🌱 The farina in 'Salvia farinacea' refers to the mealy or flour-like white powder (epicuticular wax) coating the stems and leaves, which helps the plant conserve water in hot, dry conditions.
- 🌱 White Dome is remarkably popular in xeriscape and water-wise gardens because it blooms prolifically with minimal supplemental watering once its root system is established—often outperforming more thirsty ornamentals.
- 🌱 The white flower spikes are so densely packed that they can contain hundreds of individual tiny flowers, making a single plant a significant nectar source for pollinators over an entire season.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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