Nemesia strumosa

Bright, cheerful blooms perfect for borders, containers & hanging baskets.

For optimal germination rates, initiate seed propagation indoors under controlled conditions—unless the species exhibits a high sensitivity to root disturbance. This approach allows precise regulation of temperature, humidity, and light, improving germination consistency and seedling viability. Do not skip any recommended seed treatments, as they are essential for uniform and successful germination.

Seed Treatment:
Soak seeds in room-temperature water for 4–6 hours
• Surface sow – do not cover with soil as seeds need light to germinate

Best Time to Sow
Indoors: 6–8 weeks before last frost
Outdoors: After danger of frost has passed and soil warms in spring

Optimum Germination Temperature
Use a heat mat to maintain a steady temperature of 18–21 °C (65–70 °F)

Germination Time: 7 to 28 days

Sowing Instructions
• Use trays or pots with seed-starting mix
• Press seeds gently into surface — do not bury
• Keep soil evenly moist, not soggy
Humidity: Use a humidity dome or clear cover to maintain consistent moisture during germination. Open the dome BRIEFLY once per day to allow fresh air in and reduce mold risk. Remove the dome entirely once seedlings emerge.

Light Requirements
Bright light required for germination
• Use grow lights to maintain 12–16 hours of light per day

Post-Germination Care
• Remove humidity cover once seedlings emerge
• Thin or transplant when seedlings have 2–3 sets of true leaves
• Harden off before planting outdoors: expose gradually to outdoor conditions over 7–10 days

Spacing
• Space 15–20 cm (6–8 in) apart in beds or containers

Growing Tips
• Prefers cool, moist weather — partial sun in hot climates
• Deadhead to prolong blooming
• Water regularly but avoid soggy soil
• Can struggle in extreme heat — consider afternoon shade in summer

Blooms spring to early summer with rich reds, pinks, yellows, purples & bicolors!