Heirloom

Cramer's Rose

Celosia argentea cristata

Photo: Cramer, Henri (18..-1877). Compositeur · Wikimedia Commons · (Public domain)

Cramer's Rose is a classic heirloom flower variety prized for its full, layered blooms and rich coloring. Reaching maturity in 90-120 days, this rose develops abundant flowers throughout the growing season under full sun conditions. The variety is distinguished by its exceptional hardiness and disease resistance, thriving in well-draining loam with minimal fertility requirements. Its vigorous growth habit and prolific flowering make it an ideal choice for both garden displays and cut flower arrangements.

Harvest

90-120d

Days to harvest

📅

Sun

Full sun

☀️

Zones

10–11

USDA hardiness

🗺️

Height

9-18 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 Cramer's Rose in USDA Zone 7

All Zone 7 flower →

Zone Map

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Cramer's Rose · Zones 10–11

What grows well in Zone 7? →

Growing Details

Difficulty

Easy

Spacing12-18 inches

SoilWell-draining loam, tolerates average to slightly fertile soil

WaterRegular

SeasonWarm season annual

ColorRed (traditional Cramer's Rose variety)

Size2-6"

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

Crested-type flowers bloom prolifically on well-branched plants. Bloom size is approximately 2-6" across. With approximately 15-20 stems per plant, Cramer's varieties prove to be workhorses in the garden. Selected by the late, and well-known, commercial flower farmer, Ralph Cramer. Also known as cockscomb and crested cock's comb. According to Johnny's Selected Seeds, Cramer's Rose is 90 - 120 days to maturity, annual, open pollinated. Notable features: Use for Cut Flowers and Bouquets, Ideal for Drying and Crafts.

Light: Full sun (6 or more hours of direct sunlight a day). Soil: High Organic Matter, Loam (Silt), Sand. Soil pH: Neutral (6.0-8.0). Drainage: Good Drainage, Occasionally Dry. Height: 0 ft. 9 in. - 1 ft. 6 in.. Spread: 0 ft. 9 in. - 1 ft. 0 in.. Spacing: 12 inches-3 feet. Growth rate: Rapid. Maintenance: Low. Propagation: Seed. Regions: Coastal, Piedmont.

Harvesting

Cramer's Rose reaches harvest at 90 - 120 days from sowing per Johnny's Selected Seeds. Expect 2-6" at peak. As an annual, harvest continues until frost ends the season.

Smooth, glossy, shiny capsule contain many seeds

Color: Black. Type: Capsule.

Edibility: The leaves and young shoots are cooked and used in soups and stews. The seeds yield edible oil.

Storage & Preservation

Fresh Cramer's Rose flowers are best stored in a cool environment between 50-55°F with moderate humidity (60-70%). Keep stems in water on the counter or in the refrigerator to extend vase life to 7-10 days. For preservation, air-dry bundles hanging upside-down in a warm, well-ventilated space for 2-3 weeks to create dried arrangements. Alternatively, press individual flowers between paper and heavy books for botanical pressing, or freeze blooms in water-filled ice cube trays for craft preservation. These methods retain color and texture well for decorative and archival purposes.

History & Origin

Cramer's Rose is open-pollinated, meaning seed saved from healthy plants will produce true-to-type offspring. Listed in the Johnny's Selected Seeds catalog.

Origin: Tropical Africa

Advantages

+Produces 15-20 stems per plant, making it exceptionally productive
+Crested blooms reach 2-6 inches, providing substantial visual impact
+Well-branched growth habit creates full, attractive plants naturally
+Prolific flowering ensures continuous blooms throughout the growing season
+Easy to grow variety suitable for beginner gardeners

Considerations

-Requires 90-120 days to mature, limiting planting windows
-Prefers well-draining soil and struggles in heavy clay
-Susceptible to root rot in overly wet conditions
-Blooms can deteriorate quickly in extremely hot, humid weather

Companion Plants

Marigolds (especially Tagetes patula) and garlic do real pest-disruption work near Cramer's Rose — their volatile compounds confuse aphids and whiteflies looking for a landing spot. Chives and parsley pull similar duty and top out at 8-12 inches, so they won't shade out a plant that needs full sun to hit its full 18-inch height. Lavender and catmint draw in predatory hoverflies and parasitic wasps that keep soft-bodied pest populations in check without any input from you. Black walnut is a hard no — its roots push juglone into the surrounding soil, and celosia is sensitive enough that even proximity well outside the drip line can stunt or kill it.

Plant Together

Lavender

Repels aphids, moths, and other pests while attracting beneficial pollinators

Marigold

Deters nematodes, aphids, and whiteflies while adding vibrant color contrast

Garlic

Natural fungicide properties help prevent black spot and powdery mildew

Chives

Repels aphids and Japanese beetles while improving soil with sulfur compounds

Catmint

Deters ants, aphids, and rodents while attracting beneficial insects

Clematis

Provides vertical interest and shares similar growing conditions without competing

Allium

Strong scent repels aphids, thrips, and other rose pests

Parsley

Attracts beneficial insects like hoverflies that prey on rose pests

Keep Apart

Black Walnut

Releases juglone toxin that inhibits rose growth and can cause wilting

Large Trees

Creates excessive shade and competes aggressively for nutrients and water

Brassicas

Heavy feeders that compete for nutrients and may attract pests harmful to roses

Pests & Disease Resistance

Common Pests

Spider mites, aphids, whiteflies

Diseases

Powdery mildew, root rot in wet conditions

Troubleshooting Cramer's Rose

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

Fine webbing on leaf undersides, leaves looking stippled or bronzed, especially during hot dry stretches

Likely Causes

Spider mite (Tetranychus urticae) infestation — thrives when temps push above 85°F and humidity drops
Dusty conditions that stress the plant and make it more attractive to mites

What to Do

1.Blast the undersides of leaves with a strong stream of water every 2-3 days to knock mites off
2.Apply insecticidal soap or neem oil in the early morning — full coverage on leaf undersides is what matters
3.If the plant is heavily colonized and neighbors are clean, pull and bag the worst specimens rather than risk spread

White powdery coating on upper leaf surfaces, starting on older leaves, usually late summer

Likely Causes

Powdery mildew (Erysiphe or Golovinomyces spp.) — airborne fungal spores that spread fast in warm days/cool nights with low airflow
Overcrowding — plants spaced tighter than 12 inches trap humidity between them

What to Do

1.Strip affected leaves and dispose of them in the trash, not the compost pile
2.Spray with a diluted baking soda solution (1 tablespoon per gallon of water) or potassium bicarbonate as a low-input option
3.Next season, space plants at the full 18-inch end of the range and keep them out of dead-air corners against walls or fences

Stems turning dark and mushy at the soil line, plant wilting even when the soil is moist

Likely Causes

Root rot — most often Pythium or Rhizoctonia when soil stays saturated too long
Planting in a low spot or heavy clay that doesn't drain between rain events

What to Do

1.Pull the plant — there's no saving a celosia with rotted roots; focus on preventing spread to neighbors
2.Work coarse perlite or aged compost into the bed before replanting to break up compaction and improve drainage
3.Skip the fixed watering schedule — check the top inch of soil first; Cramer's Rose wants consistent moisture, not standing water

Frequently Asked Questions

How long do Cramer's Rose flowers last in a vase?▼

Fresh Cramer's Rose blooms typically last 7-10 days in a vase when kept in cool water between 50-55°F. Change water every 2-3 days and remove any lower foliage to prevent bacterial growth. Keeping them out of direct heat and away from ripening fruit extends vase life significantly. For longer enjoyment, air-dry them for permanent arrangements.

Is Cramer's Rose good for beginners?▼

Yes, absolutely! Cramer's Rose is rated as easy to grow, making it excellent for beginner gardeners. It requires full sun and standard garden care with no special requirements. The plants branch well and produce 15-20 stems prolifically, giving rewarding results even for first-time flower growers. Its heirloom status also makes it a reliable, time-tested choice.

Can you grow Cramer's Rose in containers?▼

Yes, Cramer's Rose grows well in containers. Use well-draining potting mix and ensure pots are at least 8-10 inches deep to accommodate the root system. Place in full sun (6+ hours daily) and water regularly to keep soil consistently moist. Container-grown plants may produce slightly fewer stems than in-ground plants but still provide abundant blooms for cutting and arrangement.

When should I plant Cramer's Rose seeds?▼

Start Cramer's Rose seeds indoors 6-8 weeks before your last spring frost, or direct sow outdoors after the last frost date when soil is warm. Seeds germinate in 7-14 days in warm conditions (70-75°F). The variety reaches harvest maturity in 90-120 days, so timing your planting ensures blooms from mid-summer through fall.

What does Cramer's Rose cockscomb look like?▼

Cramer's Rose features distinctive crested-type flower heads that resemble a rooster's comb, ranging 2-6 inches across. Colors vary by cultivar. Plants are well-branched with approximately 15-20 stems per plant, creating full, bushy specimens that bloom prolifically throughout the growing season for continuous color and cutting material.

How does Cramer's Rose compare to other celosia varieties?▼

Cramer's Rose is a premium heirloom cockscomb variety selected by renowned commercial flower farmer Ralph Cramer. It excels in productivity with 15-20 stems per plant and large 2-6 inch blooms. Unlike some celosia varieties, Cramer's type is especially valued for cut flowers and arrangements due to superior stem count and bloom abundance for commercial and home use.