Can I grow hydrangeas in containers?
Written by
Michael Sullivan
Reviewed by
Prof. Martin Thorne, Ph.D.Hydrangeas grown in containers can be used for patios, balconies, and small gardens as they add flexibility. Compact varieties, such as Cityline Mars or Little Lime, are well-suited for this growing style. Growing hydrangeas in containers gives you more control over soil conditions; hydrangeas, whose color can change based on pH levels in the soil, can especially benefit from container growth. Knowing the exact conditions can result in vibrant blooms. I have had container hydrangeas thriving in small ground spaces, as well.
Pot Selection
- Use 16-24 inch pots with drainage holes for root expansion
- Choose plastic or fiberglass over terracotta for winter durability
- Ensure containers have adequate weight to prevent tipping
Soil Mix Formula
- Combine quality potting soil with 30% compost for nutrition
- Add perlite or pine bark for improved drainage and aeration
- Maintain pH 5.5-6.5 for optimal nutrient availability
Water Management
- Water when top 2 inches of soil become dry to the touch
- Use saucers to catch runoff but empty after 30 minutes
- Increase frequency during summer heat to daily watering
Seasonal Care
- Move pots to sheltered locations during winter below 25°F (-4°C)
- Rotate containers quarterly for even sun exposure
- Prune roots during repotting to maintain manageable size
Repotting schedule keeps the plant healthy every 2 to 3 years.Schedule to be done in early spring before new growth. Loosen circling roots and trim roots by a third. Replace the soil with a new mix at the same planting depth. I repot my container hydrangeas during their dormancy in March.
Winter Protection safeguards roots from extreme cold in winter climates. If temperatures drop below 25°F (-4°C), relocate container plants to an unheated attached garage. Use protective insulation, such as bubble wrap or burlap wraps, to cover pots. In winter dormancy, water the plant monthly to prevent desiccation. My potted hydrangeas survive Minnesota winters by using this method.
Fertilization needs differ significantly from those of plants grown in the ground. Apply 10-10-10 slow-release fertilizer in early spring when new growth has emerged. During flowering, supplement every four weeks with liquid bloom booster. After August, reduce feeding to harden the plant for winter. Container plants typically require more frequent feeding compared to other specimens growing in your garden.
Pest control emphasizes prevention in small areas. Inspect the underside of your leaves weekly for signs of aphids or spider mites. If you see an infestation, treat it promptly with insecticidal soap/protectants. To control powdery mildew, increase air circulation around plants to keep foliage drier. Container plants can also exhibit issues sooner than those in the garden, allowing you to intervene before the plant becomes overly stressed.
Read the full article: How to Care for Hydrangea: Complete Growing Guide
