Peonies can be challenging to grow in Arizona due to its hot climate and low-chill winters, as most peonies require a period of cold dormancy to thrive. However, with proper selection and care, it is possible to grow certain types of peonies in Arizona, especially in cooler regions or with artificial chilling methods.
Here’s a breakdown of peony types suitable for Arizona:
Types of Peonies for Arizona
1. Herbaceous Peonies
Varieties:
Sarah Bernhardt (light pink, fragrant)
Festiva Maxima (white with red flecks)
Suitability: These are challenging in Arizona’s low-chill areas but can succeed with extra care in higher elevations or regions with cooler winters.
Special Care:
- Provide artificial chilling (refrigerate roots for 6–8 weeks before planting).
- Plant in a spot with morning sun and afternoon shade.
2. Intersectional (Itoh) Peonies
Varieties:
Bartzella (yellow, semi-double blooms)
Cora Louise (white with lavender centers)
Suitability: A better choice for Arizona because they are more heat-tolerant and require less chilling than herbaceous peonies.
Special Care:
- Plant in partial shade to protect from intense afternoon sun.
- Ensure soil is well-draining and keep roots cool with mulch.
3. Tree Peonies
Varieties:
Kamata-nishiki (purple)
High Noon (yellow)
Suitability: These peonies have woody stems and are more heat-tolerant than herbaceous varieties, making them a viable option for Arizona’s climate.
Special Care:
- Plant in a location with filtered sunlight.
- Avoid overwatering to prevent root rot.
Tips for Growing Peonies in Arizona
Site Selection:
- Choose a location with morning sun and afternoon shade.
- Avoid areas with intense, direct sunlight all day.
Soil Preparation:
- Use well-draining soil enriched with organic matter.
- Maintain a pH of 6.5–7.0.
Artificial Chilling:
- For herbaceous and Itoh peonies, refrigerate roots at 32–40°F for 6–8 weeks before planting.
Mulching:
- Use mulch to keep the soil cool and conserve moisture.
Watering:
- Water deeply but infrequently, ensuring the soil remains moist but not waterlogged.
Planting Time:
- Plant peonies in fall (October to November) for best results.
Best Locations in Arizona for Peonies
- Higher Elevations: Regions like Flagstaff, Prescott, or Sedona with cooler temperatures are more suitable for peonies.
- Low Desert Areas: Peonies may require artificial chilling and more shade.
Peonies to Avoid
- Japanese Peonies and Wild Peonies may struggle in Arizona’s heat and are better suited for colder, more temperate climates.
By selecting the right type of peony and providing appropriate care, you can enjoy these stunning flowers even in Arizona’s unique climate.
