Heirloom

Double Zahara™ Brilliant Mixture

Zinnia marylandica

Photo: Tournasol7 · Wikimedia Commons · (CC BY 4.0)

Harvest

75-85d

Days to harvest

📅

Sun

Full sun to partial shade

☀️

Zones

11–12

USDA hardiness

🗺️

Height

12-24 inches

📏

Planting Timeline

Zone:

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Start Indoors

Transplant

Direct Sow

Start Indoors

Transplant

Direct Sow

Showing dates for Double Zahara™ Brilliant Mixture in USDA Zone 7

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Zone Map

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Double Zahara™ Brilliant Mixture · Zones 11–12

What grows well in Zone 7? →

Growing Details

Difficulty

Easy

Spacing9-12 inches

SoilWell-drained soil, fertile to moderately fertile

WaterRegular, keep soil consistently moist but not waterlogged

SeasonWarm season annual

ColorMulti-color mix: cherry, salmon, yellow, crimson, and white

Size1 1/2-2 1/2"

Zone-by-Zone Planting Calendar

Zone	Indoor Start	Transplant	Direct Sow	Harvest
Zone 3	April – May	June – July	June – August	—
Zone 4	March – April	June – June	June – July	—
Zone 5	March – April	May – June	May – July	—
Zone 6	March – April	May – June	May – July	—
Zone 7	February – March	April – May	April – June	—
Zone 8	February – March	April – May	April – June	—
Zone 9	January – February	March – April	March – May	—
Zone 10	January – January	February – March	February – April	—
Zone 1	May – June	July – August	July – September	—
Zone 2	April – May	June – July	June – August	—
Zone 11	January – January	January – February	January – March	—
Zone 12	January – January	January – February	January – March	—
Zone 13	January – January	January – February	January – March	—

Complete Growing Guide

An easy-to-grow choice for cheerful color in the garden or pots. Bright and happy mix of hues in cherry, salmon, yellow, crimson, and white. Highly uniform plants with a low-growing, mounding habit that flower continuously, providing weeks of color. Abundant fully double blooms average 1 1/2-2 1/2" wide. Zahara dwarf zinnias were bred for powdery mildew resistance and long-lasting color for landscapes and garden beds. According to Johnny's Selected Seeds, Double Zahara™ Brilliant Mixture is 75 - 85 days to maturity, annual, open pollinated. Notable features: Easy Choice, Grows Well in Containers, Attracts Beneficial Insects.

Light: Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours). Soil: Clay, High Organic Matter, Loam (Silt), Sand. Soil pH: Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage, Moist. Height: 1 ft. 0 in. - 2 ft. 0 in.. Spread: 0 ft. 6 in. - 1 ft. 0 in.. Spacing: 12 inches-3 feet. Growth rate: Medium. Maintenance: Low. Propagation: Seed. Regions: Coastal, Mountains, Piedmont.

Harvesting

Double Zahara™ Brilliant Mixture reaches harvest at 75 - 85 days from sowing per Johnny's Selected Seeds. Expect 1 1/2-2 1/2" at peak. As an annual, harvest continues until frost ends the season.

Type: Achene.

Storage & Preservation

Double Zahara Brilliant Mixture flowers are ornamental and not meant for consumption. For cut flowers, place stems in a vase with fresh, cool water immediately after cutting. Keep them in a cool location (65-72°F) away from direct sunlight and ripening fruit. Change water every 2-3 days and recut stems at an angle. Cut flowers typically last 7-10 days. To preserve blooms longer, you can dry flowers by hanging bunches upside-down in a warm, dark, well-ventilated area for 2-3 weeks. Alternatively, press flowers between parchment paper under heavy books for flat, decorative preservation, or use silica gel for faster drying while maintaining color and shape.

History & Origin

Double Zahara™ Brilliant Mixture is open-pollinated, meaning seed saved from healthy plants will produce true-to-type offspring. Listed in the Johnny's Selected Seeds catalog.

Origin: Mexico, southwestern USA

Advantages

+Powdery mildew resistance bred into variety makes disease management easier
+Continuous flowering for 75-85 days provides extended color without deadheading
+Low-growing mounding habit perfect for containers and landscape edging
+Mix of five vibrant colors creates cheerful visual impact in gardens
+Fully double blooms stay abundant throughout growing season

Considerations

-Color segregation may occur; plants might not stay mixed as advertised
-Dwarf habit limits height for background plantings or cut flower use
-Requires deadheading in hot climates to maintain continuous blooming
-Susceptible to spider mites in hot, dry conditions like other zinnias

Companion Plants

Marigolds (especially Tagetes patula) are worth planting nearby — they push back on whiteflies and aphids without demanding anything unusual from the bed. Alyssum stays low, under 6 inches, and pulls in parasitic wasps that target aphid populations, so it works the border without competing for the light Double Zahara needs. Cosmos and Cleome sit at compatible heights and won't shade the Zinnias out. Skip Fennel — it produces anethole compounds that suppress germination and stunt most annuals within 18 inches of it. Impatiens is a mismatch on basic cultural grounds: it needs shade and reliably wet soil, two conditions that will rot a Double Zahara before it ever sets a bud.

Plant Together

Marigolds

Repel nematodes and aphids while attracting beneficial insects

Nasturtiums

Act as trap crops for aphids and cucumber beetles, deterring pests from zinnias

Cosmos

Attract beneficial insects and pollinators, complement zinnia's bloom time

Sunflowers

Provide beneficial shade and attract pollinators and pest-eating birds

Basil

Repels thrips, aphids, and whiteflies that commonly affect zinnias

Cleome

Attracts beneficial insects and creates vertical interest without competition

Celosia

Similar growing requirements and attracts beneficial insects while adding texture

Alyssum

Ground cover that attracts beneficial insects and doesn't compete for nutrients

Keep Apart

Black Walnut Trees

Release juglone toxin that inhibits zinnia growth and causes wilting

Impatiens

Compete for similar nutrients and space, prone to same fungal diseases

Fennel

Allelopathic properties inhibit growth of most flowering annuals including zinnias

Troubleshooting Double Zahara™ Brilliant Mixture

What you'll see, why it happens, and what to do about it.

White powdery coating on leaves and stems, usually showing up mid-summer when nights cool down slightly

Likely Causes

Powdery mildew (Erysiphe cichoracearum) — common on standard Zinnia elegans, though Double Zahara (Z. marylandica) has improved resistance, it's not immune under humid, crowded conditions
Poor airflow from tight spacing under 9 inches apart

What to Do

1.Thin or space plants to at least 9–12 inches so air moves between them
2.Remove and trash (don't compost) heavily affected leaves
3.Apply a diluted neem oil spray (2 tsp per quart of water) every 7 days until symptoms stop spreading

Flower buds forming but failing to open, or petals browning and rotting before they expand after rainy stretches

Likely Causes

Botrytis blight (Botrytis cinerea) — gray mold that attacks soft tissue in cool, wet weather above 60% humidity
Overhead irrigation soaking the flower heads

What to Do

1.Switch to drip or base-level watering — keep water off the blooms entirely
2.Deadhead any rotting buds immediately and throw them in the trash
3.If gray fuzzy spore masses confirm Botrytis, apply a copper-based fungicide every 10 days during wet spells

Seedlings collapse at the soil line within the first 10–14 days after germination

Likely Causes

Damping off — typically Pythium or Rhizoctonia species — triggered by overwatering or unsterilized seed-starting mix
Trays with no drainage holes holding standing water at the root zone

What to Do

1.Use a sterile, well-draining seed-starting mix in trays with drainage; sanitize reused trays in a 10% bleach solution before filling
2.Water from the bottom and let the surface dry slightly between waterings
3.Thin to one seedling per cell by day 7 so crowded stems aren't trapping moisture against each other

Frequently Asked Questions

How long do Double Zahara Brilliant Mixture flowers bloom?▼

These zinnias flower continuously throughout the growing season, providing weeks of color until frost. With regular deadheading of spent blooms, they will produce flowers from midsummer through fall, typically 75-85 days after planting. The continuous flowering habit makes them ideal for long-lasting garden color and cutting.

Are Double Zahara Brilliant Mixture zinnias good for beginners?▼

Yes, they are excellent for beginners. They're specifically bred to be easy-to-grow with exceptional powdery mildew resistance and require minimal care. Their low-growing, mounding habit means they need little pruning, and they thrive in full sun with regular watering. Even novice gardeners can achieve abundant blooms with this variety.

Can you grow Double Zahara Brilliant Mixture in containers?▼

Absolutely. These dwarf zinnias are perfect for containers and pots. Their compact, mounding growth habit makes them ideal for hanging baskets, window boxes, and planters. Ensure containers have drainage holes and use quality potting soil. They'll flower abundantly in containers with regular watering and deadheading.

When should I plant Double Zahara Brilliant Mixture seeds?▼

Start seeds indoors 4-6 weeks before your last frost date, or direct sow after all danger of frost has passed and soil has warmed. These heat-loving annuals germinate best in warm soil (70-75°F). Transplants can go in the garden after hardening off, typically after the last frost date.

What makes Double Zahara different from other dwarf zinnias?▼

Double Zahara zinnias are specifically bred for powdery mildew resistance, uniform compact growth, and continuously abundant double flowers. The 'Brilliant Mixture' offers a cheerful blend of cherry, salmon, yellow, crimson, and white colors. They're more disease-resistant and reliable than many other dwarf varieties.

How much sun do Double Zahara Brilliant Mixture zinnias need?▼

These zinnias perform best in full sun but will tolerate partial shade. They need at least 4-6+ hours of direct sunlight daily for optimal flowering. In hotter climates, some afternoon shade can prevent stress, but ensure they still receive adequate light for continuous blooming.