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Cut flowers1 variety
Wallflower
Cheiranthus allioniiNamed for their ability to bloom in cooler conditions. Blooms with crocuses and continues for weeks. Biennial in zones 3-5.
Days to maturity
45–100 daysDays to germ.
7–30 daysSpacing
6–12 inHeight
10–18 inSun
Full Sun to Partial ShadeHow we grow it
Germination
- Days to germ.
- 7–30 d
- Soil temp
- 65–70 °F
- Depth
- 0.125 in
- Light for germ
- light
- Pre-treatment
- Stratification: late fall or early spring planting, or 30 days of refrigeration.
Culture
- Days to maturity
- 45–100 d
- Spacing
- 6–12 in
- Height
- 10–18 in
- Sun
- Full Sun to Partial Shade
- Frost
- Zones 3-9 · to -40°F · hardy
- Sow indoors
- No
- Outdoor / direct
- Yes
Harvest
Recent field notes
Plant in full bloom in late summer the year it was sown.
Timing · Zone 5a
JanFebMarAprMayJunJulAugSepOctNovDec
Outdoor / directApr 23 – Jun 4
Bloom (from outdoor)Jun 7 – Sep 13
Windows are anchored to an average last frost of May 21 (1 year in 10 as early as Apr 29, as late as Jun 2) and an average first frost of Sep 18 (1 year in 10 as early as Sep 6, as late as Oct 8). In a late or early year, slide them with it.
Compare in the calendarTrials
Every Wallflower sowingSeed sources, counts, ratings, and the observations kept against each one.Wallflower trials