Michaelmas daisy
Symphyotrichum
An ornamental plant, planted March to May, or sown in April.
In September: mulch the Michaelmas daisy.
Add Michaelmas daisy to my plot
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Michaelmas daisy, month by month
Bar: the usual months. Sprout: this month.
| Sowing, planting or job | Sep | Oct | Nov | Dec | 2027Jan | Feb | Mar | Apr | May | Jun | Jul | Aug |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sow outdoors. | none | none | none | none | none | none | none | usual | none | none | none | none |
| Plant a pot-grown Michaelmas daisy. | none | none | none | none | none | none | usual | usual | usual | none | none | none |
| Lift and divide the Michaelmas daisy. | none | none | none | none | none | none | usual | usual | none | none | none | none |
| Mulch the Michaelmas daisy. | usual | usual | usual | none | none | none | usual | usual | usual | none | none | none |
| Stake the Michaelmas daisy. | none | none | none | none | none | none | usual | usual | usual | none | none | none |
| Cut back the Michaelmas daisy. | none | none | usual | none | none | none | none | none | none | none | none | none |
What to do, and when
The usual months for a UK garden. Your own plan gives the week.
Sowing and planting
Sow outdoors in April, 1cm deep, 45cm apart. Moderate source: J Parker’s.
Plant out, 50cm apart. Moderate source: Chiltern Seeds.
Plant a pot-grown Michaelmas daisy March to May, 25 to 60cm apart. Strong source: RHS. Weaker source for the spacing: Plantura.
Lift and divide the Michaelmas daisy
Every 3 to 5 years, not every year.
Usually March to April. Strong source: RHS.
Mulch the Michaelmas daisy
Use well-rotted manure or garden compost, 5cm deep on light sandy soil.
Usually March to May, and September to November. Strong source: RHS.
Stake the Michaelmas daisy
Let the clump grow up through netting or a round grid support frame.
Usually March to May. Moderate source: RHS.
Cut back the Michaelmas daisy
Cut the stems close to the ground.
Usually November. Moderate source: RHS.
What the source words mean
Strong: the RHS page for this plant is among them.Moderate: another trusted UK source, or the RHS on its group.Weaker: a blog, a forum, a small website or a page from outside the UK. Treat it as a guide.
Add Michaelmas daisy to my plot
Every line above names the page it comes from. Where we found no good source for a job, we left it out. Where the name “Michaelmas daisy” comes from.