Double Begonias can be propagated in various tray sizes including 72, 84, and 105’s. Propagation Cycle: 5 weeks
- Choose a well-drained aerated propagation media
- Avoid media containing peat moss which will hold too much water
- Choose a blended media with other components or inorganic media such as Oasis® or Rockwool®
- Bottom heat will promote healthy root development.
- Maintain bottom heat at 70-75°F/21-24°C.
- Mist will cool the media temperature. Monitor media temperature closely and frequently.
- Double Begonias roots easily without the use of rooting hormone. However, time to root and uniformity in rooting may be improved with use of a hormone.
- Either liquid or powder formulations work equally well. Choose a product with up to 2500 ppm IBA or up to 500 ppm NAA.
- Average days with mist vary from 6-9 days depending on environmental conditions in the greenhouse.
- Mist cuttings so they remain turgid but avoid over misting that results in saturated media.
- Over misting will result in slow rooting and possible problems with root rot and botrytis.
- Cuttings should not be pinched in propagation
- Growth regulating shouldn’t be necessary in propagation.
Choose a media with the following traits:
- Good aeration
- Porosity between 5-15%
- Avoid excess irrigation and fertilization while plants are establishing which can lead to slow root development. Once plants have established do not allow to dry excessively which will result in damage to foliage and flowers.
- Fertilizer Regime
- Begin fertilizing 2 weeks after transplant.
- Choose a complete balanced fertilizer complete with minor elements.
- Apply 200 ppm constant liquid feed.
- Avoid fertilizers high in ammoniacal nitrogen.
- A slow release product may also be used to supplement a constant liquid feed program and may provide improved performance for the consumer.
- Maintain pH between 5.5-6.2
- Optimum EC is 1.5 to 2.0 mmhos. Provide periodic clear water application if excess salts accumulate.
Diascia can be grown successfully at a wide range of temperatures but for best results the crop should be established warm. As root growth and top growth begins temperatures can be reduced.
Establishing temperature: 65F/18°C average daily temperature
Temperatures for growing on: 68-72°F/18-22°C day and 62-64°F/16-18°C night temperatures.
- Maintain relative humidity below 70% and provide good air circulation to avoid problems with botrytis.
- 2000 candles/22,100 lux minimum
- 4000 foot candles/43,1000 lux maximum
Establish plants pot tight than space to:
- 4” pots – 5-6” centers (approximately 2 per sq. ft.)
- 6” pots/1 gallon – 14” centers
- 8” pots – 18” centers
1st Pinch- pinch out growing tips 1-2 weeks after transplant
Plant Growth Regulators
Cultural management offers the most effective methods of preventing stretch. Adequate spacing, controlled temperatures and DIF, soil moisture management and good light all promote compact, quality growth.
- If needed Cycocel® as a spray at 750-1500 ppm is effective at controlling stretch.
Insect and Disease Concerns
- Root and stem rots
|Container Size||# of cuttings per pot||Total Crop Time (Weeks)|
|4”||1 (no pinch)||6|
|6” / 1 gallon||3||6-8|
|10” Hanging Basket||3-4||10-14|
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