Id-Code: PA 237
Family: Scrophulariaceae
Origin: Complex hybrid between Mexican and American species
Special Features: Brilliant flower colours in pink, red, lavender to purple. Abundant flowering; attractive narrow glossy foliage. Also available in ruby red ('Sunburst Ruby') and purple ('Sunburst Amethyst')
History: Introduced by JELITTO PERENNIAL SEEDS in 2010
Colour: Colour mixture of pink, red, lavender to purple, most with white eyes
Natural Flowering Period: June - September
Winter Hardiness Zones: Z5-8
Growth Habit: Upright
Foliage: Narrow, glossy leaves
Height with Flowers: 45 cm (18'')
Spacing between Plants: 50 cm (20'')
Soil Requirements: Well-drained garden soils, pH 5.8 - 7.2
Location: Full sun
Use: The Sunburst series are great for retail sales and landscape use - rock garden, planters, or sweeping drifts in the border
Specialities: First year flowering. Requires little maintenance

Cultural Tips:
Grams per 1000 Seeds: 0,5
Seeds per Gram: 2000
Seeding Recommendation: 1 g / 1000 plants
Sowing Rate: 2 seeds per cell
Plug tray recommended size(s): 128, 288
Germination: Rapidly germinating, keep seed in constant moisture (not wet) with temperatures of about +20°C [68°F]. Seeds must be covered thinly. Keep in cooler conditions after germination occurs. The germination might be slower and more irregular. This poses no problems.

Scheduling:
Best Sowing Dates: Anytime
Sowing to Germination: 2 - 3 weeks
Germination to Transplant: 3 - 4 weeks
Transplanting to Salable Plant: 6 - 8 weeks
Cutting-Back at Transplanting: Cut-back once to keep more compact

Growing On:
Container Size(s): 1-2 plugs per 11/12 cm (4 1/2''); 2-3 plugs per 15 cm (6'')
Vernalization: There is no current research on vernalization but a prudent recommendation for any perennial would be 6-12 weeks (a few might need 15 weeks!) at an average daily temperature of 40°F (5°C). Exposure to cold may not be necessary for flowering but might improve quality.
Forcing: An obvious place to experiment - following vernalization - would be raising daytime temperatures to 60° - 65°F (15° - 17°C). Provide 16 hours of continuous lighting. During the short days of winter, provide a night interruption lighting of 4 hours between 10:00 p.m. and 2:00 a.m.
Fertilization: Medium (150-200 ppm)