Get Sowing for a Spectacular Summer
With the right timing, these Half-Hardy Annuals will thrive—producing long-lasting, productive plants that bring colour and movement to your cutting patch.
Looking for the best varieties?
Explore our Zinnias
Find unique Amaranthus varieties
Discover the best Celosia for cutting
Shop Nasturtium seeds for a vibrant, self-seeding display
April is all about sowing smart, not early—so give these heat-lovers the start they need, and your cutting garden will reward you all season long.
Zinnias
are the ultimate cut-and-come-again flower, blooming continuously from summer until the first frost. One sowing is all you need for months of colour.
Sow under glass in trays or pots and plant out after the last frost.
Alternatively, direct sow outdoors once the weather has warmed.
Pinch out the growing tip once the first two sets of leaves have formed—this encourages bushier plants and more flowers.
Amaranthus
With its cascading or upright blooms, amaranthus adds a dramatic, textural element to bouquets and floral installations.
The Caudatus series is perfect for hanging arrangements like floral chandeliers and moongates.
The Cruentus series produces stunning upright plumes that bring height and structure to displays.
Strip all leaves from stems before use to prevent wilting—the flowers last well out of water.
Sow indoors thinly as seeds are tiny and quickly become overcrowded. Thin out seedlings before planting in their final position after frost risk has passed.
Celosia
These sun-loving blooms are traditionally grown as bedding plants, but they’re also excellent for cutting. Their unique texture and rich colours make them a standout in arrangements.
Very cold-sensitive—don’t rush sowing. If in doubt, wait.
Sow under glass, then thin out and plant out only when it’s reliably warm.
Pinch out the growing tip to encourage branching and more flowers.
Nasturtiums
A staple in potager gardens, nasturtiums do double duty as a cut flower and pest deterrent. Their trailing or bushy forms fill gaps beautifully in both flower beds and bouquets.
Large seeds make them easy to sow, just 2–3 per 4” pot.
Plant out after the last frost when the soil is warm.
No need to pinch out—nasturtiums naturally branch and produce an abundance of flowers.
They self-seed readily, so expect them to return year after year.
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