The "Strawberry Sundae" hydrangea (Hydrangea paniculata 'Rensun') is a beautiful deciduous shrub prized for its large, conical flower heads and compact growth habit. Here's some information about it:

1. Description: Strawberry Sundae hydrangea typically grows to a height and width of about 4 to 5 feet, forming a dense, rounded mound of foliage. It features large, pyramid-shaped flower clusters that emerge creamy white in mid-summer and gradually transition to shades of pink, eventually turning a deep strawberry-red in late summer to fall. The flower heads are held upright on sturdy stems, creating a stunning display in the garden.

2. Growing Conditions: Strawberry Sundae hydrangea thrives in full sun to partial shade and prefers moist, well-drained soil. It is relatively adaptable and can tolerate a range of soil types, including loam, clay, and sandy soils. Regular watering is important, especially during hot, dry periods, to promote healthy growth and flowering.

3. Maintenance: This cultivar is generally low-maintenance and requires minimal pruning. However, it can be pruned in late winter to early spring to remove dead or damaged branches and to shape the shrub as desired. Deadheading spent flower heads can help promote additional blooms and prevent self-seeding. Mulching around the base of the shrub can help retain soil moisture and suppress weeds.

4. Landscaping Uses: Strawberry Sundae hydrangea is versatile and can be used in a variety of landscape settings, including borders, mass plantings, and foundation plantings. Its compact size and colorful flowers make it suitable for small gardens, urban landscapes, and mixed perennial beds. It also works well as a focal point or specimen plant.

Overall, Strawberry Sundae hydrangea is a stunning and easy-to-grow shrub that adds color and texture to the landscape with its beautiful flowers. With its compact size and long-lasting blooms, it's a popular choice for gardens and landscapes.