Hydrangeas are striking garden shrubs, with bunches of pink, blue and white flowers. They grow in both large and small varieties and thrive in outdoor gardens and in containers. Small hydrangeas such as the "Mini Penny" cultivar do well in the right pots with specific soil, lighting and watering considerations.
Mini Penny hydrangeas belong to the macrophylla group, and so bloom in both blue and pink, depending on soil acidity. These shrubs grow to 3 to 4 feet in height and spread, with deciduous foliage. They're hardy to U.S. Department of Agriculture Hardiness Zone 5 to Zone 9.
Use large, heavy pots with drainage holes for Mini Penny hydrangeas to avoid transplanting. Choose 10- to 15-gallon pots in clay, stone or wood. These materials stay cooler for potted hydrangeas. Always use pots with drainage holes to ensure quick drainage.
Hydrangeas enjoy deep, loose and nutritious soil, and do best with some acidity in their foundation. The North Carolina State University Cooperative Extension recommends mixing pine bark--based potting soil, sphagnum peat moss and sand for potted hydrangeas. Mix quick-draining potting soil and organic compost for a simpler, but still nutritious, foundation.
Location, Water, Fertilizer
Put your Mini Penny hydrangea in full to partial shade, indirect light or filtered sun. This shrub burns and fails in too much bright light, but it also fails in deep, cold shade. Water the hydrangea with 4 to 5 inches of water a week, and fertilise it in the spring with 8-8-8 or 10-10-10 granular fertiliser. Always follow the manufacturer's directions with regard to safe fertiliser applications.