1. Planting: The Duchess of Edinburgh Clematis thrives in cool, moist, well-drained soil and prefers full sun to partial shade. To promote optimal growth and blooming, remember the principle of "feet in the shade, head in the sun." This deer-resistant variety flourishes with proper care.

These vines prefer rich, loose, well-drained soil with organic matter and shaded roots, achievable through low-growing plants or mulch, while their leaves enjoy sunlight. 

Once you receive your clematis, plant it immediately, allowing enough space for growth. At planting time, position a stake, trellis, or arbor for support, using a structure with rungs no thicker than half an inch and gaps no more than six inches apart. 

2. Watering: Consistent watering during droughts is crucial for a healthy clematis. However, ensure proper drainage to prevent root diseases.

3. Fertilizing: Fertilize in early spring, just before new growth begins, to ensure your plant has a strong start. Consider using a balanced NPK fertilizer or organic compost.

4. Pruning: The Duchess of Edinburgh Clematis benefits from moderate pruning in late winter to early spring, before blooming. This encourages abundant flowers, and deadheading spent blooms promotes continuous flowering throughout the season.