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Roses are among the hardiest of all plants. With over 200 species and thousands of cultivated varieties, there is a rose for almost every garden. In the desert, roses thrive with afternoon shade and at least 6 hours of full sunlight each day to produce abundant, high-quality blooms.
Rose Identification by Class
Roses are categorized by their growth habit and bloom style:
- Hybrid Tea: The most popular class, featuring large, well-formed single blooms on long cutting stems. Height typically ranges from 4 to 6 feet.
- Grandiflora: Taller than Hybrid Teas (often 8 to 10 feet), these feature long stems with clusters or sprays of large blooms.
- Floribunda: Descended from Hybrid Teas and Polyanthas, these produce small to medium blooms in clusters on shorter, bushy plants (3 to 4 feet tall).
- Polyantha: Short, glossy-leafed bushes covered in clusters of smaller double flowers. Excellent for borders; size ranges from 1½ to 3 feet tall.
- Shrub: Includes English roses. Characterized by dense growth, a neat habit, and continuous blooming. Reaches 2 to 4 feet in height.
- Miniature: Plant size varies, ranging from tiny leaves and 1-inch blooms to larger foliage with 3-inch blooms. Excellent for containers.
Rose Patents
- Patented Rose: A newer variety developed by a breeder and protected from unauthorized propagation for 17 years.
- Non-Patent Rose: Older, “tried-and-true” varieties no longer covered by patents that have been grown successfully for generations.
Soil Preparation
For best results, dig a hole 2 feet deep and 2 feet square. The area must be free of grass and competing tree or shrub roots. Fill the hole with water to check drainage; if it remains for more than 4 hours, brake up the restrictive caliche layer until it drains readily.
Because our native soils lack organic matter, blend equal parts native soil with a high-quality organic soil amendment like Dr. Q’s® Pay Dirt Planting Mix & Mulch. Incorporate Dr. Q’s® Gold Dust starter fertilizer and soil sulfur according to package directions to support initial growth.
Planting a Container Rose
Container-grown roses: Can be planted anytime except during the intense heat of summer.
- Prep: Remove the plant from its container. If roots are tangled, make light vertical cuts on the root ball. Trim any broken or crushed root ends.
- Position: The plant should sit in the hole so the crown (where roots meet the stem) remains above ground level.
- Fill: Place the plant, backfill with the amended soil, and water thoroughly to settle the air pockets.
- Basin: Build a 2-foot diameter-irrigation basin around the plant and water with a Dr. Q’s® Plant Tonic, root-stimulator solution.
Care After Planting
Mulch the irrigation basin with 2–4 inches of composted mulch to conserve moisture, regulate soil temperature, and suppress weeds. Avoid using rocks as mulch, as they reflect intense heat onto the plant, superheat the soil, and trap moisture that promotes soggy, unhealthy root conditions.
Fertilizing Established Roses
To maintain steady growth and heavy blooming, use Dr. Q’s® Rose & Flower Food, a perfectly balanced rose fertilizer. Apply fertilizer whenever the current crop of buds begins to show color, generally every 4-6 weeks during the growing season. Spread the product from 6 inches away from the base to 12 inches beyond the drip line, then lightly scratch it into the soil. Always irrigate before and after fertilizing to prevent root burn. Do not apply significant nitrogen in November, December, or January, as this encourages soft growth that is vulnerable to winter frost.
Watering
Deep, infrequent watering is essential. Light, frequent watering encourages shallow roots that stress easily in heat and wind. Use a moisture meter or check the soil 2-4 inches below the surface to determine when to irrigate. Adjust your timer regularly based on weather, observation, and soil moisture rather than relying on a static schedule.
Disease and Pest Management
- Powdery Mildew: A white, fuzzy fungus on leaves and buds. To Prevent, improve air circulation through proper seasonal pruning and only water early in the morning. Treat with a copper fungicide or Neem Oil if necessary.
- Iron Deficiency (Chlorosis): Indicated by yellowing leaves with bright green veins. Often caused by overwatering or high soil pH. Improve drainage and apply iron supplements if needed.
- Use Dr. Q’s Iron Worker® or KeRex® as a supplement.
- For immediate results, use Ferti-lome® Soil Acidifier Plus Iron. This helps address the high pH common in our desert soils and provides iron in a liquid form, making it available to the plant immediately.
- Aphids: Small, soft-bodied insects on new growth. Wash off with a strong jet of water or use insecticidal soap.
- Spider Mites: thrive in hot, dry, dusty conditions. Keep the plant hydrated and wash foliage with water to discourage infestations.
Monthly Care Calendar
- January: Plant dormant/bare-root roses. Prune established roses before they leaf out.
- For more information see Star Note #105B The Principles of Pruning Dormant Roses
- Clean up debris and apply dormant oil/neem oil to kill overwintering pests and spores.
- February: Plant container roses. Apply a “wake-up” fertilizer to stimulate growth.
- For the complete Dr Q’s Rose Potion recipe see Star Note #605 Fertilizer Mixture for Established Roses
- March–May: Fertilize every 4–6 weeks. Monitor for iron deficiency. Remove secondary buds on Hybrid Teas for exhibition-sized flowers.
- June–August: Apply fertilizer at half-strength. If plants receive full afternoon sun, skip fertilizing in July/August to let the plants rest through the extreme heat. Deeply water and mulch. In late August, provide a light “haircut” to remove damaged canes and stimulate fall growth.
- September: Return to the full-strength fertilizer schedule.
- October: The primary fall bloom cycle. Keep deadheading to encourage repeat flowering.
- November–December: Gradually reduce irrigation frequency. Evaluate rose performance and discard poor performers to make room for new varieties.
For additional local guidance Las Vegas Valley Rose Society: This is the primary local affiliate of the American Rose Society in the Las Vegas area. They are dedicated to helping community members grow roses successfully. You can reach out to them for information or membership inquiries via their email: roseinfo@lasvegasvalleyrosesociety.com. Or contact your local Cooperative Extension office.