Growing Ball Chrysanthemums (Chrysanthemum)
Ball chrysanthemums are popular autumn flowers with a compact, spherical growth habit and an abundance of small blooms in a wide range of colors. They are easy to grow in both pots and garden beds, making them suitable for beginners as well as experienced gardeners. Ball chrysanthemums add vibrant color late in the season, often continuing to bloom well into November.
What are ball chrysanthemums?
Ball chrysanthemums are specially bred forms of chrysanthemums (Chrysanthemum × morifolium) that flower profusely in a rounded, compact shape. Unlike cut chrysanthemums and indoor varieties, ball chrysanthemums are intended for outdoor cultivation in containers or garden beds. They are available in a broad spectrum of colors and flower forms, from single to fully double blooms.
Most ball chrysanthemums are not winter-hardy in Sweden and are therefore grown as annuals. However, there are exceptions, and it is possible to attempt overwintering them in frost-free conditions.
Planting – when, where, and how
Ball chrysanthemums are most commonly sold in late summer and early autumn. They can be planted at any time during this period as long as the soil is not frozen.
In pots: Choose a container with drainage holes. Use nutrient-rich potting soil and plant at the same depth as the plant stood in its original pot. Water thoroughly after planting.
In garden beds: Select a sunny to partially shaded location with humus-rich, well-drained soil. Plant at the same depth as in the pot. Ball chrysanthemums work well as colorful accents among other perennials in borders.
Soil and placement
Ball chrysanthemums thrive best in nutrient-rich, well-drained soil that is evenly moist but not waterlogged. In containers, standard potting soil works perfectly well. Place the plant in sun to partial shade, preferably sheltered from strong winds and heavy rain to protect the delicate flowers.
Watering and feeding
Keep the soil evenly moist, but avoid overwatering. Water when the soil feels dry a few centimeters below the surface. Both too much and too little water can cause buds to dry out or roots to rot. Ball chrysanthemums purchased in bloom usually do not require additional fertilization.
Care for long-lasting flowering
Regularly remove faded flowers to prolong the blooming period. Keep the plant well watered and protect it from frost by covering it or moving it to a frost-free location if needed. Choose a position with gentle sunlight or partial shade to prevent the flowers from fading too quickly.
Pruning
Ball chrysanthemums generally do not require pruning. If overwintering the plant, it can be cut back to about 10–15 cm after flowering. For early-grown or overwintered plants, pinching the shoots in early summer can encourage a bushier growth habit.
Overwintering
Most ball chrysanthemums do not survive winter outdoors in Sweden, but in mild parts of the country it may be possible in sheltered locations. The safest option is to bring the plant indoors and place it in a frost-free, bright, and cool environment (5–10°C). Water sparingly during winter. Repot and start growth again in spring.
Extending the flowering period
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Place the plant in a cool, bright location, but not in direct, intense sunlight.
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Keep the soil evenly moist without overwatering.
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Remove faded flowers continuously.
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Protect the plant from heavy rain and frost.
Summary
Ball chrysanthemums are easy to care for and provide abundant flowering in late summer and autumn. They are suitable for both garden beds and containers and are excellent for adding life and color to the autumn garden. With proper placement, watering, and care, you can enjoy their blooms for a long time. For those who want to go a step further, it is also possible to overwinter and grow your own ball chrysanthemums for the next season.
Author: Emma Vogiatzi
Fact-checked by: Erik Hoekstra
Last updated: 2025-11-28