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An Ideal Home gardening report recommends deadheading cosmos, zinnias, dahlias, repeat-flowering roses and calendula in October while they are still actively flowering. Removing faded blooms may encourage further flowers in mild weather, but it cannot keep tender plants blooming after frost.
Ideal Home’s October gardening guide names cosmos, zinnias, dahlias, repeat-flowering roses and calendula as plants to deadhead while they are still flowering. Removing faded blooms may encourage further flowers in suitable conditions, the report says, but the effect depends on weather and will not bring frost-damaged tender plants back into bloom.
Deadheading means removing flowers as they fade. The report’s central advice is to cut or pinch off spent blooms from the five listed plants during October, rather than leaving them on the plant to form seed. Jane Westoby, creative director at The Hampshire Seed Company, says cosmos and zinnias can continue flowering when faded blooms are removed, provided the weather stays mild.
For dahlias, the report cites Ross Dyke, a consultant horticulturist at Hornby George and host of the Plant Pod, who says removing spent flowers can be worthwhile while the plants are still actively blooming. Repeat-flowering roses may also produce another flush after faded flowers are removed, according to Westoby. Calendula can be deadheaded as its petals fade and curl; removing its flowers can also limit self-seeding.
The advice is conditional, not a guarantee of extra flowers. The report says blooms can continue until temperatures drop or frost arrives. Gardeners should use clean, sharp snips or secateurs suited to the stem, and clean tools between plants, as the source recommends. No specific number of extra flowers or guaranteed flowering period is given.
How Deadheading Can Extend Autumn Colour
For gardeners with plants still flowering, removing spent blooms is a practical way to encourage plants to put resources toward further flowering instead of seed production. That can help maintain colour in beds and containers during a period when many summer displays are winding down.
The benefit varies by plant and conditions. The advice is most relevant where plants remain healthy and are actively producing flowers; it does not mean deadheading can override cold weather. For calendula, the choice also affects seed: gardeners who want it to self-seed may prefer to leave some flowers in place.
garden pruning shears for deadheading
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October’s Five Suggested Plants
The Ideal Home report focuses on five plants that may still flower in autumn: cosmos and zinnias, described as cut-and-come-again flowers; dahlias, which may continue blooming into October; repeat-flowering roses, capable of producing another flush; and calendula, a self-seeding annual. The guide presents these as seasonal gardening suggestions, not as a claim that every plant in every garden will respond the same way.
Its advice is to remove flowers once they have faded, rather than cutting healthy blooms. For calendula, the report identifies petals that are fading and curling as a cue. Timing and results will depend on local temperatures, the plant’s condition and whether frost has arrived.
“They’re cut-and-come-again flowers: the more you pick for the vase or remove fading blooms, the more they’ll keep flowering, provided the weather stays mild.”
— Jane Westoby, creative director at The Hampshire Seed Company
Weather Sets the Limits on Blooms
The report does not quantify the effect of deadheading or say how many additional flowers gardeners should expect. It also does not provide a region-specific frost date, and October conditions vary by location. Its claim is that removing faded blooms may help plants continue flowering when conditions remain suitable.
It is also not clear how each plant will respond in a particular garden, where plant health, variety and growing conditions differ. Frost remains a clear limit for tender annuals: the source says deadheading will not restart flowering once frost has finished them.
Check Plants as Temperatures Fall
Gardeners following the report’s advice can check the five plants through October and remove blooms as they fade, while they remain actively flowering. Use clean, sharp tools appropriate to the stems and clean them between plants, as recommended in the source material.
As temperatures fall, watch for local frost and adjust expectations: deadheading may support further flowering in mild conditions, but it cannot extend a tender annual’s season after frost. Gardeners who want calendula to spread by seed can leave some flowers rather than removing every spent bloom.
Key Questions
Which plants does the October guide recommend deadheading?
The guide lists cosmos, zinnias, dahlias, repeat-flowering roses and calendula, while they are still flowering.
Does deadheading guarantee more flowers?
No. The report says removing faded blooms may encourage further flowering, particularly in mild weather. It gives no guaranteed bloom count or length of time.
When should calendula be deadheaded?
The report suggests removing calendula flowers once the petals begin to fade and curl. Leaving some flowers may allow the plant to self-seed.
Can deadheading bring tender annuals back after frost?
No. Westoby says deadheading will not bring tender annuals back into flower once frost has finished them.
Source: rss
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