Blue Hydrangea (Hydrangea macrophylla)

Description:
Blue Hydrangeas are beloved flowering shrubs known for their breathtaking, vibrant blue blooms that brighten gardens from late spring to early fall. These deciduous plants produce large, rounded clusters of flowers, often referred to as “mopheads,” complemented by lush green foliage. The blue hue of the flowers is influenced by soil acidity, with more acidic soils producing the deepest blue shades. Blue Hydrangeas typically grow 3–6 feet tall and wide, making them perfect for foundation plantings, borders, or as stunning focal points. Their long-lasting flowers are also ideal for cutting gardens and floral arrangements.
Hardiness zones: USDA 5–9.

Planting Instructions for Blue Hydrangea
Choose the Right Location:
Blue Hydrangeas thrive in a spot with partial shade, where they receive morning sun and afternoon shade. They prefer moist, well-draining soil that is rich in organic matter. For the most vibrant blue blooms, the soil pH should be between 5.0 and 5.5.

Prepare the Soil:
Test your soil's pH, as acidic soil is key to achieving blue flowers. Amend the soil with sulfur or peat moss to lower pH if necessary. Mix in compost or organic matter to improve soil fertility.

Dig the Hole:
Dig a hole twice as wide and as deep as the root ball. This ensures the roots have plenty of space to establish and grow.

Planting:
Gently remove the hydrangea from its container and loosen the roots.
Place the plant in the hole so the top of the root ball is level with the soil surface.
Backfill with soil, gently firming it around the roots to remove air pockets.

Water Thoroughly:
Water deeply after planting to help settle the soil and establish the roots. Hydrangeas love consistent moisture, so water regularly, especially during dry periods.

Mulch:
Apply a 2–3 inch layer of mulch around the base to retain soil moisture, regulate temperature, and suppress weeds. Keep the mulch a few inches away from the stems to prevent rot.

Care Tips for Blue Hydrangea
Watering: Blue Hydrangeas need consistent moisture but avoid overwatering or waterlogging. Deeply water at the base 1–2 times per week, more often during dry spells.

Fertilizing: Use a balanced fertilizer for flowering plants in early spring and mid-summer. If maintaining blue blooms, choose a fertilizer low in phosphorus and high in potassium.

Pruning: Prune after blooming by cutting back spent flowers and shaping the plant. Avoid pruning in early spring, as this can remove flower buds.

Soil Maintenance: To keep blooms blue, periodically check soil pH and amend with aluminum sulfate or sulfur if needed. Neutral or alkaline soil will result in pink flowers.

Winter Protection: In colder zones, mulch heavily around the base or wrap the shrub to protect it from frost.

Blue Hydrangeas bring unparalleled elegance and color to any garden. Their adaptable size, long-lasting blooms, and ability to change flower color based on soil pH make them a versatile and enchanting choice for landscapes. Whether planted in borders, containers, or as stand-alone specimens, these shrubs are sure to captivate with their vibrant beauty and charm.