Creating a mini cassis garden in an outdoor plant box is a fantastic way to grow blackcurrants even in limited spaces. Here’s a simple guide to get you started:

1. Choose the Right Plant Box: Opt for a sturdy, well-draining outdoor plant box at least 18 inches deep to accommodate the roots of blackcurrant plants.

2. Select Healthy Cassis Plants: Purchase disease-resistant blackcurrant varieties like ‘Ben Connan’ or ‘Ben Sarek’ for optimal growth in containers.

3. Prepare the Soil: Use a mix of compost, peat-free potting soil, and perlite to ensure good drainage and fertility.

4. Planting: Space the cassis plants about 2 feet apart in the box. Plant them at the same depth as their nursery pots and water thoroughly.

5. Sunlight and Watering: Place the box in a spot with 6-8 hours of sunlight daily. Water regularly, keeping the soil moist but not waterlogged.

6. Pruning and Care: Prune annually to remove old wood and encourage new growth. Fertilize in early spring with a balanced organic feed.

With proper care, your mini cassis garden will yield delicious blackcurrants, perfect for jams, desserts, or fresh eating!