Water Deutzia Baroniana regularly during the growing season, especially in hot, dry weather. Ensure the soil is kept consistently moist but not waterlogged.

Reduce watering in the dormant winter months, allowing the top few centimeters of soil to dry out between waterings.

Prune Deutzia Baroniana immediately after flowering to maintain shape and encourage bushier growth. Remove any dead, damaged, or crossing branches.

For older plants, a harder prune can be done in late winter to rejuvenate them, but this may sacrifice the current season's blooms.

Propagate Deutzia Baroniana from semi-hardwood cuttings taken in mid-summer. Dip cuttings in rooting hormone and plant in a well-draining potting mix.

Keep them in a humid environment, such as a propagator, until roots have formed. Alternatively, sow seeds in autumn.

Repot Deutzia Baroniana every 2-3 years, or when it becomes root-bound, preferably in early spring before new growth emerges. Use a good quality, well-draining potting compost.

Ensure the new pot is only slightly larger than the current one to avoid waterlogging.