Jooni
Deutzia
2 Species
Species
Fertilizing
Apply balanced slow-release granular fertilizer (20-20-20 or similar) in spring after establishment. For young shrubs, work 2 pounds per 100 square feet into the soil around the plant. Alternatively, drill 6-inch deep holes at the drip line and add 1/4 pound fertilizer per foot of shrub height, divided between holes. For container plants, use liquid fertilizer like Miracle-Gro 3-4 times between April and July. A spring mulch of organic matter benefits soil health.
Placement
Plant in full sun for maximum flowering, though some varieties like 'Chardonnay Pearls' tolerate part shade. Grows best in USDA zones 5-8 in well-draining soil. Avoid hot locations as deutzia prefers moderate temperatures. Can tolerate winter temperatures down to -4°F. Works well in woodland gardens, borders, and as specimen plants. Smaller varieties are suitable for containers.
Pruning
Prune just after flowering since blooms form on previous year's growth. Limit top pruning to 30% of growth to maintain shape. For mature plants, do renewal pruning in early spring by removing 2-3 of the largest canes to ground level each year over a 3-year period. This rejuvenates the plant but temporarily reduces blooming. Remove suckers regularly as they emerge from the base. Take care not to over-prune as it ruins the natural arching habit.
Repotting
Only repot container-grown deutzias when pot-bound. Use well-draining potting mix amended with compost. Ensure container has adequate drainage holes. Most varieties are deciduous and lose leaves in winter, though some subtropical types remain evergreen in warm zones. When transplanting to garden, fall is ideal to establish roots before spring blooming.
Watering
Provide consistent moisture until established. Once mature, natural rainfall is often sufficient as plants tolerate some drought. Avoid overwatering as deutzia is susceptible to root rot in soggy conditions. Better to err on slightly dry side. For container plants, water when top inch of soil feels dry. Reduce watering in winter when plant is dormant.