Ideas for Cool-Weather Windowboxes

colorful windowbox makes bright winter display

colorful windowbox makes bright winter display

Photo by: DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

DK - How to Grow Practically Everything, 2010 Dorling Kindersley Limited

From: DK Books - Lawns

When your summer flowers are spent, and window displays are looking bedraggled and dull, give them a quick makeover with colorful evergreens that will last the course through the coldest winter. This combination of conifers, shrubs, grasses, and herbs is guaranteed to perform for many months.

When to Start: Early autumn
At Its Best: Early autumn to spring
Time to Complete: 1 1/2 hours

Materials Needed:

  • large windowbox
  • ericaceous potting mix
  • multipurpose potting mix
  • broken plastic pieces
  • bucket
  • carex oshimensis 'Evergold'
  • cupressus macrocarpa 'Goldcrest'
  • Golden thyme, Thymus pulegioides 'Archer's Gold'
  • Leucothoe Scarletta
  • stipa tenuissima
  • Japanese tassel fern, Polystichum polyblepharum
  • winter-flowering pansies, Imperial Antique Shades
  • Cupressus macrocarpa 'Goldcrest'
  • Grape hyacinth, Muscari
  • Narcissus 'Topolino'

Before Planting

Buy a frost-resistant windowbox — this one is made from terracotta, but a plastic imitation would be best if you live in a cold, exposed area that is prone to frosts. Check that your plants fit comfortably in the container.

Window Box Winter Tips

Window Box Winter Tips

Photo by: DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

DK - How to Grow Practically Everything, 2010 Dorling Kindersley Limited

Soak the Plants

Water each plant well, either with a watering can without a rose, or by dunking the plants in a bucket of water. Allow the bubbles to dissipate, then remove the pots and allow them to drain.

Watering Plants Before Transplanting to Window Box

Watering Plants Before Transplanting to Window Box

Photo by: DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

DK - How to Grow Practically Everything, 2010 Dorling Kindersley Limited

Provide Good Drainage

Break up a plastic plant tray and add the pieces to the bottom of the windowbox. Then add a layer of ericaceous potting mix — the Leucothoe and Gaultheria are both acid-loving plants and do best in this type of soil.

Plastic in Bottom of Container Helps Drainage

Plastic in Bottom of Container Helps Drainage

Photo by: DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

DK - How to Grow Practically Everything, 2010 Dorling Kindersley Limited

Place Plants in Position

Place the plants in their original pots in the windowbox and make sure that they will sit about 1 in (2 cm) below the rim when planted to allow sufficient space for watering.

Window Box Container Gardens

Window Box Container Gardens

Photo by: DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

DK - How to Grow Practically Everything, 2010 Dorling Kindersley Limited

Plant Up and Firm In

Plant up and fill in around each plant with soil, firming it in with your fingers as you go. Water well. Water your box once or twice a week in winter, and more frequently in spring.

Box Planting for Winter

Box Planting for Winter

Photo by: DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

DK - How to Grow Practically Everything, 2010 Dorling Kindersley Limited

Extend the Season

This colorful windowbox makes a bright winter display with a mixture of pansies and textured evergreens. Then, as the weather starts to warm up, blue grape hyacinths and dainty daffodils (not in flower here) appear in succession to keep the interest going throughout spring.

colorful evergreens used in winter window box

colorful evergreens used in winter window box

Photo by: DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

DK - How to Grow Practically Everything, 2010 Dorling Kindersley Limited

Plant Up Bulbs

Follow Steps 1 to 3. Evenly space the narcissi bulbs on the layer of soil, and plant the rest of the plants carefully between them.

Finishing Touches

Fill in around the plants and cover the bulbs with soil, up to about 3 in (8 cm) from the rim. Add a few grape hyacinth bulbs between the plants and then cover with soil to about 1 in (2 cm) from the rim. Firm gently and water.

Top Tip: Caring for Pansies

Winter-flowering pansies will bloom throughout the cold winter months, although they put on their best performance in spring. Remove the dying flowers as you see them, and if plants become straggly in spring, renovate them by cutting the stems back to 3 in (8 cm). Then apply an all-purpose fertilizer and water in well.

Cold Climate Flowering Pansies

Cold Climate Flowering Pansies

Photo by: DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

DK - How to Grow Practically Everything, 2010 Dorling Kindersley Limited

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