How to Plant Biennials

Learn to sow seeds in four simple steps

Wallflowers Bloom with Tulips in Sunny Border

Wallflowers Bloom with Tulips in Sunny Border

Plant wallflower seedlings in a sunny garden with tulips and other bulbs for beautiful spring color.

©2011, Dorling Kindersley Limited

2011, Dorling Kindersley Limited

Materials Needed

  • biennial seeds of choice
  • horticultural grit
  • compost or well-rotted manure
  • rake
  • watering can or garden hose
  • gardening fork

Step 1: 

Remove Weeds and Stones from Soil Before Sowing

Sow Mix of Wallflower Seeds Over Fine Soil

Sow Mix of Wallflower Seeds Over Fine Soil

Choose a sunny place and clear the space of weeds. Sow seeds thinly and evenly, and then water using a watering can with a fine rose.

©2011, Dorling Kindersley Limited

2011, Dorling Kindersley Limited

Work organic matter, such as well-rotted manure or compost, into heavy clay soils. Rake it to make an even surface. Sow seed thinly and evenly, and then water.

Step 2: 

Wait for Seedlings to Grow

Carefully Lift Out Wallflower Seedlings with Fork

Carefully Lift Out Wallflower Seedlings with Fork

Lift out seedlings using a garden fork, making sure to leave enough soil around the roots for replanting.

©2011, Dorling Kindersley Limited

2011, Dorling Kindersley Limited

When they reach 2 inches (5 cm) tall and have a few leaves, lift them carefully with a hand fork. Retain plenty of soil around the roots. Water the soil around the plants thoroughly an hour before lifting.

Step 3: 

Replant 6–8 inches Apart, Firming Them With Your Fingers

Replant Wallflower Seedlings and Firm In Soil

Replant Wallflower Seedlings and Firm In Soil

Dig a hole for each plug plant so that the base of the stem of the plant is level with the surface of the soil. Fill the soil in around the plant and firm in. Leave spaces between the plants and water well.

©2011, Dorling Kindersley Limited

2011, Dorling Kindersley Limited

Keep them well watered in summer. If they are not in their final position, you can replant them again in the fall.

Step 4: 

Plant in Sunny Borders with Tulips and Other Spring Bulbs or in Container

Wallflowers Bloom with Tulips in Sunny Border

Wallflowers Bloom with Tulips in Sunny Border

Plant wallflower seedlings in a sunny garden with tulips and other bulbs for beautiful spring color.

©2011, Dorling Kindersley Limited

2011, Dorling Kindersley Limited

Many biennials do not like excessive rain, so protect them with a tarp during wet periods.

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