How-to Guide
How to Grow Shasta Daisies
The short answer
Shasta daisy (Leucanthemum x superbum) is hardy in USDA zones 5-9 and blooms June through September in full sun to very light shade and moist, well-drained soil. Illinois Extension is blunt about its two vulnerabilities: it is a short-lived perennial, and waterlogged winter soil shortens its life further — drainage is the difference between a daisy that returns and one that doesn't.
Deadhead to prolong the bloom period, then cut plants down in mid-September to stimulate vegetative growth and help extend the plant's garden life. Divide every few years in spring: Colorado State PlantTalk lists Shasta daisies among perennials needing division and says summer bloomers are best divided in spring before growth begins.
Site and soil
Plant in full sun to very light shade in moist, well-drained soil. Winter drainage is critical: Illinois Extension warns that waterlogged winter conditions can shorten the lifespan of an already short-lived perennial. Avoid low spots and heavy unamended clay, or plant slightly raised. Mature height runs 1 to 3 feet depending on cultivar.
Deadheading and the September cutback
Deadhead spent daisies through summer to prolong the June-September bloom period. Then comes the counterintuitive step: cut plants down in mid-September. Illinois Extension recommends this to stimulate vegetative growth — the basal rosettes that overwinter — and to help extend the plant's garden life.
✔ The mid-September cutback is the cheapest longevity treatment a Shasta daisy gets: it pushes energy into overwintering rosettes instead of seed.
Dividing
- 1Divide in spring — As a summer bloomer, Shasta daisy is best divided in spring before it begins to grow, per Colorado State PlantTalk's rule for summer- and fall-blooming perennials.
- 2Lift and expose the crown — Loosen and dig the whole clump, preserving as many roots as possible, and shake or wash off soil.
- 3Cut into pieces — Slice the clump with a sharp knife into sections, keeping a minimum of two to three growing points per division; discard weak, woody centers.
- 4Replant and water — Plant divisions in freshly prepared, well-drained soil and keep them moist while they establish.
Why Shasta daisies disappear
- They are short-lived perennials by nature — regular division renews them.
- Wet winter soil kills crowns; drainage matters more than cold.
- Old undivided clumps decline in vigor and bloom; divide every few years in spring.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- Illinois Extension — Shasta Daisy — Zones 5-9; full sun to light shade; moist well-drained soil; June-September bloom; deadhead to prolong bloom; cut down mid-September to stimulate vegetative growth and extend garden life; short-lived perennial; waterlogged winters shorten lifespan
- Colorado State University PlantTalk — Dividing perennials — Shasta daisies listed among perennials needing division; summer/fall bloomers divided in spring before growth; division method (dig, wash, slice, 2-3 growing points, replant moist)