Roggli Rose

Flowering Type: Day length neutral plant will flower regardless of day length.

Flowering Mechanism: No vernalization required. Irradiance is the primary mechanism that initiates flowering. High light intensity will initiate flowering once plants reach 3–5 true leaves.

Germination: Maintain optimal conditions for seedling development, should begin on the day of sowing until root emergence. Expect root emergence in 3–6 days from sowing.

Cover: Cover the seeds lightly with vermiculite.

Sowing method: 1–2 pellets per plug

Media: pH 5.5–6.2, EC < 0.7. Bellis are sensitive to high soluble salts in the media.

Temperature: Ensure 20–22 °C (68–72 °F) until radicle emergence. Afterwards, keep temperatures of 18–20 °C (64–68 °F) during day and night. When the roots reach the bottom of the cell, the temperature can be lowered to 16–18 °C (60–64 °F).

Moisture: Begin with a wet (4) for germination, then reduce to a moist (3) on day 6. As the seedlings become fully developed with expanded cotyledons, the moisture level can be decreased further to a medium (2). Bellis are sensitive to watering stress. Protect the seedlings from direct sunlight.

Humidity: 95–100 % until day 6, then reduce to 40–60 %. Provide proper ventilation and horizontal airflow to improve oxygen levels in the media.

Light: Light is not required, but can be beneficial if using a germination chamber as it will reduce stretch and improve seedling quality and uniformity. From stage 2, provide light levels of 2,000–2,500 ft-candles (20,000–25,000 lx).

Fertilizer: Bellis are sensitive to high salt levels, so ensure to maintain an EC below 0.7. Begin feeding at 50–100 ppm nitrogen once germination is complete. Then the sprays can be increased to 100–175 ppm.

Plug Bulking and Flower Initiation: Maintain optimal conditions during the vegetative stage from cotyledon expansion to flower initiation. When the seedlings root to the edge of the plug and reach the 4–6 true leaf stage, flower initiation will occur.

Growth Regulators: No growth regulators should be necessary in plug stage.

Fungicides: Preventative applications are recommended to control soil-borne diseases.

Media: pH 5.5–6.2, EC 1.0–1.2. Use a well-drained medium and do not plant the plugs too deeply. It is not recommended to add slow-release fertilizer to the substrate.

Light: Day length neutral plants. Provide 3,500–4,000 ft-candles (35,000–40,000 lx) for the fastest finish.

Temperature: Ensure 16–18 °C (60–64 °F) during days, 10–12 °C (50–54 °F) during nights after transplanting. Afterwards, a frost-free production (indoors or outdoors) with a minimum temperature of 3–5 °C (38–41 °F) at night is recommended. For outdoor production, a fleece cover is required in case of frost. Cooler temperatures promote a stable, compact and well-branched plant habit. Temperatures above 12 °C (54 °F) will result in large foliage, thin and long flower stems. 4–6 weeks prior shipping, start raising the temperature to 10–12 °C (50–54 °F).

Moisture: Bellis are sensitive to watering stress, so keep the moisture level constantly to a medium (2).

Humidity: 40–60 % humidity is ideal. High rates or wet foliage will cause botrytis.

Fertilizer: Moderate fertilization levels are required. Fertilize the crop every two weeks with 100–175 ppm nitrogen, using a complete balanced fertilizer. Under low light and cool temperatures, use a potassium-based fertilizer (16-5-25). Avoid high ammonium and high nitrogen levels. The roots are sensitive to high salt levels. Once the plants begin to build buds, the frequency of fertilization must be increased to avoid chlorosis.

Growth Regulators: B-Nine (daminozide) used as a spray at 1,000–2,000 ppm as required. Bellis are sensitive to high concentration of propiconazole; this can result in leaf damage.

Fungicides: Do not plant the plugs too deeply. Apply fungicides as needed to control root and leaf diseases.

Common Diseases: Botrytis, rust, mildew.

Pests: Primarily aphids.

Post Harvest: 4–6 weeks prior shipping, raise the temperature to 10–12 °C (50–54 °F).

Plug Crop Time
288 tray: 5-6 weeks
128 tray: 7-8 weeks

Finished Crop Time (from 288 tray)
Fall: 5-8 weeks
Spring – pack: 12-14 weeks
Spring – 10-12 cm (4-5"): 14-16 weeks