PlantSowGrow
How to grow Stock (Ten Week Mixed)
Matthiola incana
Spikes of double flowers with a rich, spicy-clove scent — gorgeous in pots near the house and as cut flowers.
At a glance: Sow mid April to mid May.
When to sow, plant and harvest
Timed for a typical UK garden (last frost mid-April). The app uses your own town's frost dates.
Growing Stock (Ten Week Mixed): what it needs
- Light
- Full sun · 6+ hours a day
- Watering
- Water in dry spells; pots daily in summer
- Soil
- Any well-drained soil
- Spacing
- 25 cm
- Height
- 45 cm
- In pots
- Grows well in containers
- Feeding
- Liquid feed every two weeks once flowering starts
- Hardiness
- USDA zones 2–11
- Difficulty
- Easy
Step by step
- Mid April – mid May · around the last spring frost
Sow Seeds Outdoors
Sow thinly where they are to flower, in a sunny spot, into raked, weed-free soil. After pricking out, keep the palest-leaved seedlings — they give double flowers.
- 7–14 days after “Sow Seeds Indoors” · Late April
Check Germination
Seedlings should appear in 7–14 days. Keep the soil moist. If sown outdoors, thin them to 25 cm apart once they have two true leaves.
- 56–86 days after “Check Germination” · Mid June – mid July
First Flowers — Deadhead Regularly
Snip off faded flowers every few days to keep new ones coming for months. Take a photo for your journal!
- Mid October – early November · around the first autumn frost
Clear or Collect Seed
When frost blackens the plants, pull them up for the compost heap. Leave a few seedheads first if you want to save seed.
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