Heirloom

Oklahoma Golden Yellow

Zinnia elegans

A vibrant pink camellia flower blooms amidst green foliage.

Wikimedia Commons via Zinnia elegans

Harvest

75-90d

Days to harvest

📅

Sun

Full sun

☀️

Zones

2–11

USDA hardiness

🗺️

Height

0-3 feet

📏

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 Oklahoma Golden Yellow in USDA Zone 7

All Zone 7 flower →

Zone Map

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Oklahoma Golden Yellow · Zones 2–11

What grows well in Zone 7? →

Growing Details

Difficulty

Easy

SeasonWarm season annual

ColorGolden yellow with red-to-yellow centers

Size1 1/2-2 1/2"

Zone-by-Zone Planting Calendar

Zone	Indoor Start	Transplant	Direct Sow	Harvest
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	—
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	—

Succession Planting

Oklahoma Golden Yellow is a warm-season annual that blooms continuously once it gets going, so you don't need to succession sow the way you would with lettuce or radishes — one planting per season is the standard approach. If you're cutting heavily for market or bouquets, staggering two sowings about 3 weeks apart (a direct sow in late April and again in mid-May in zone 7) gives you a more even stem supply rather than one big flush followed by a gap.

Stop direct sowing by late June in most zones. Seeds germinate best when soil temperatures are above 60°F, and plants started much past midsummer won't have enough warm days left to hit the 75–90 day mark before frost arrives.

Complete Growing Guide

Prolific 1 1/2-2 1/2" double and semidouble petite, yet sturdy, flowers. Blooms are a rich, golden yellow with red-to-yellow centers. Excellent, reliable accent flowers for market bouquets, wedding flowers, and event work. Cut-and-come-again flower, yielding multiple cuts over the season. According to Johnny's Selected Seeds, Oklahoma Golden Yellow is 75 - 90 days to maturity, annual, open pollinated. Notable features: Grows Well in Containers, Use for Cut Flowers and Bouquets.

Light: Full sun (6 or more hours of direct sunlight a day). Soil: High Organic Matter, Loam (Silt). Soil pH: Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage, Occasionally Dry. Height: 0 ft. 6 in. - 3 ft. 0 in.. Spread: 0 ft. 8 in. - 1 ft. 0 in.. Spacing: 12 inches-3 feet. Growth rate: Rapid. Maintenance: Medium. Propagation: Seed. Regions: Coastal, Mountains, Piedmont.

Harvesting

Oklahoma Golden Yellow reaches harvest at 75 - 90 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

Store fresh-cut Oklahoma Golden Yellow flowers in a cool location with indirect light; refrigeration at 34-40°F extends vase life significantly compared to room temperature storage. Maintain 80-90% humidity to prevent petal drying. Vase life is typically 7-10 days with fresh water changes every 2-3 days and stem re-cuts. For preservation, air-dry flowers upside-down in a dark, well-ventilated space for 2-3 weeks to create long-lasting dried arrangements. Alternatively, press individual blooms between paper for 4-6 weeks to preserve them flat. Silica gel drying (24-48 hours) preserves color and form exceptionally well for display purposes.

History & Origin

Oklahoma Golden Yellow 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

Advantages

+Prolific blooming produces abundant cut flowers throughout the season
+Unique golden-yellow with red centers creates striking visual contrast
+Reliable performer for professional florists and wedding event arrangements
+Compact 1.5-2.5 inch doubles ideal for small bouquet designs
+Cut-and-come-again habit encourages bushier growth with repeated harvesting

Considerations

-75-90 day maturity requires early sowing for summer peak bloom
-Double petals may trap moisture, increasing mildew risk in humidity
-Golden yellow flowers fade noticeably in intense direct sunlight exposure
-Petite size limits use as standalone focal flowers in arrangements

Companion Plants

Marigolds (especially Tagetes patula) are the most practical companion here — they suppress soil nematodes through root exudates and draw in predatory insects that keep aphid populations down. Cosmos and sunflowers do similar work attracting beneficial wasps and hoverflies, and the height variation is useful if you're cutting for bouquets. Sweet alyssum tucked at the border of a zinnia bed earns its spot — it blooms for months and keeps ground beetles active nearby. Dill pulls parasitic wasps and does fine alongside zinnias as long as it doesn't get tall enough to shade them out.

The three problematic companions are worth understanding, not just memorizing. Black walnut produces juglone, a compound that leaches from roots and fallen leaf litter and can stunt or kill nearby plants — keep zinnias outside the drip line, which on a mature tree can extend 20 feet or more. Eucalyptus works through a similar mechanism: allelopathic compounds in its leaf drop inhibit germination and growth underneath the canopy. Fennel is a different situation; it's broadly antagonistic to most garden plants and suppresses neighbors even when it looks like it's just standing there doing nothing.

Plant Together

Marigolds

Repel nematodes and aphids while attracting beneficial insects

Nasturtiums

Act as trap crops for aphids and cucumber beetles, protecting nearby plants

Zinnia

Attract pollinators and beneficial predatory insects like ladybugs

Cosmos

Provide habitat for beneficial insects and attract pollinators

Sweet Alyssum

Attracts hoverflies and parasitic wasps that control garden pests

Lavender

Repels moths, fleas, and mosquitoes while attracting beneficial pollinators

Sunflowers

Provide wind protection and attract beneficial birds that eat garden pests

Dill

Attracts beneficial insects like lacewings and parasitic wasps

Keep Apart

Black Walnut

Produces juglone which is toxic to many flowering plants

Eucalyptus

Releases allelopathic compounds that inhibit growth of nearby plants

Fennel

Inhibits growth of most garden plants through allelopathy

Troubleshooting Oklahoma Golden Yellow

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

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

Likely Causes

Powdery mildew (Erysiphe cichoracearum) — a fungal pathogen that thrives in humid nights combined with warm, dry days
Poor airflow from crowded planting

What to Do

1.Space plants at least 12 inches apart at planting — crowding is the main accelerant
2.Remove heavily coated leaves and bin them, don't compost
3.Spray with a diluted potassium bicarbonate solution (1 tablespoon per gallon of water) every 7 days until the spread stops

Seedlings collapse at soil level, stems look pinched or water-soaked just below the surface

Likely Causes

Damping-off (Pythium or Rhizoctonia spp.) — fungal complex triggered by wet, poorly drained starting mix
Sowing too densely in trays, which keeps moisture high around stems

What to Do

1.Use a sterile, well-draining seed-starting mix — not garden soil, which carries these pathogens
2.Water from the bottom of trays and let the surface dry slightly between waterings
3.If starting indoors, run a small fan near seedlings for 30 minutes a day to dry stem bases

Petals and buds chewed or missing, small ragged holes on leaves, usually noticed in the morning

Likely Causes

Japanese beetle (Popillia japonica) — feeds aggressively on zinnia flowers in midsummer
Caterpillars (various Lepidoptera larvae), particularly on young transplants

What to Do

1.Hand-pick Japanese beetles in the early morning when they're sluggish and drop them into soapy water
2.For caterpillar pressure, apply Bacillus thuringiensis (Bt) spray directly to foliage — it works within 24–48 hours and won't harm pollinators
3.Don't site zinnias immediately adjacent to linden or rose, which pull Japanese beetle pressure into the area

Frequently Asked Questions

How long do Oklahoma Golden Yellow flowers last in a vase?▼

With proper care, Oklahoma Golden Yellow blooms typically last 7-10 days in the vase. To maximize vase life, use fresh, cool water (34-40°F if possible), re-cut stems every 2-3 days, and remove any lower foliage that would sit in water. Placing them in a cool location away from ripening fruit and direct heat extends their longevity significantly.

Are Oklahoma Golden Yellow flowers good for beginner gardeners?▼

Yes, absolutely! Oklahoma Golden Yellow is rated 'Easy' to grow, making it ideal for beginners. It's a reliable heirloom variety that thrives in full sun (6+ hours) and requires minimal maintenance. The cut-and-come-again nature means you get multiple harvests over the season with consistent care, rewarding new growers with abundant blooms.

When should I plant Oklahoma Golden Yellow flowers?▼

Plant Oklahoma Golden Yellow after your last spring frost date. The variety takes 75-90 days to reach harvest, so time your planting to bloom during your desired season. For continuous summer blooms, consider successive plantings every 2-3 weeks. They prefer full sun locations and benefit from well-draining soil for optimal growth.

Can I grow Oklahoma Golden Yellow in containers?▼

Yes, Oklahoma Golden Yellow can be successfully grown in containers. Choose a pot at least 12 inches deep with drainage holes and well-draining potting soil. Container growing allows for easy repositioning to maximize sun exposure and simplifies harvesting for cut flowers. Regular watering is important, as containers dry out faster than in-ground planting.

How many cuts can I get from Oklahoma Golden Yellow plants?▼

Oklahoma Golden Yellow is a prolific cut-and-come-again variety, yielding multiple cuts throughout the growing season when properly maintained. Regular harvesting encourages bushier growth and more flower production. With consistent cutting, deadheading, and appropriate care, a single plant can produce numerous bouquet-quality stems over 75-90+ days.

What makes Oklahoma Golden Yellow suitable for wedding and event work?▼

Oklahoma Golden Yellow offers several professional qualities: sturdy, double and semidouble petite blooms (1½-2½ inches) with attractive golden yellow petals and red-to-yellow centers. The reliable, prolific nature ensures consistent availability for arrangements. Its compact yet robust structure makes it excellent for market bouquets, wedding designs, and event floral work where quality and consistency matter.