Production technology of Alpinia purpurata (Red Ginger)

1. Production technology of
Alpinia purpurata
(Red Ginger)
PERUMAL, R.
2016603110
M. Sc., Floriculture & Landscaping

2. Introduction
 Common name : Red ginger
 Botanical name : Alpinia purpurata
 Family : Zingiberaceae
 Foliage : Evergreen
 Size : Height up to 12 ft., Width up to 3 ft.
 Flowering period : Early summer to late summer
 Foliage color : Red, white, pink
 The genus is named after the Italian botanist Prosper Alpinus

3. Soil Requirement
 A well-drained fertile one
 Porous sandy loam to clay loam soils should be selected for
cultivation
 pH: 6 -7.5 is optimum
 Soil should have good amount of organic matter.
 Monoculture should be avoided.
 Chlorosis due to high pH in calcareous soils is a common problem

4. Climatic Requirement
• Being tropical plant can tolerate up to 30oC
• Partial shade is required for optimum flowering
• Can grow up to 1500 ft. elevation

5. Propagation
 Offshoots
 Rhizome
 Seeds
 Micropropogation

6. Seeds
 Seeds are rarely produced
 Sow seeds shallow in a moist, slightly acidic, well drained
organic medium
 Seeds germinate in 2–3 weeks

7. Rhizome
• Some cultivars do not develop offshoots and must be
propagated by rhizome divisions. Divide the rhizomatous mat
into small clumps of one to four stems.
• Plant them 2 inches below the surface in vermiculite or any
well drained medium.
• Rhizome propagated plants typically produce marketable
flowers within a year when planted in beds.

8. Offshoots
• Inflorescences develop aerial offshoots (small
plantlets) from the sides of the bracts (the bract axils).
These offshoots can be used as the source of new
plants.
• Rooting of offshoots is improved with 500 ppm
auxin (IBA or NAA), although they can be rooted
without hormone treatment.
.

9. Planting
 First prepare the bed by ploughing to a fine tilth.
 Sterilize by applying Dazomet @ 30g/sq. m
Spacing: 30x30 cm
Beds: 3x1m (40 plants)
 Closer spacing increases yield per unit of production area, but
yield per plant is reduced
 Less dense plantings permit greater per-plant yields

11. Manuring and fertilization
 A basal dose of 10 to 15 tons of FYM/ha along with 75:75:50
kg/ha of NPK is recommended
 The suggested minimum elemental content of healthy green
foliage is 2% N, 0.16% P, 1.8% K, 1.8% Ca, and 0.4% Mg.
 Increasing nitrogen fertilizer increases the number of
marketable flowers

12. Irrigation
 Keep the soil moist
 Red ginger requires 1 inch or more of water per week from
irrigation during droughty periods
 The best flower quality is achieved with generous irrigation

13. Pruning
 Prune to remove spent flowering shoots and yellowed
and unsightly foliage.
 Cut off spent flowers at the ground.

14. Harvesting
 Time to harvest is shorter in the summer than in the winter
 Inflorescences are harvested in the early morning while still
turgid
 Bracts are about two-thirds to three-fourths open, as an
immature flower has a longer shelf life than a mature flower
 Floral spikes are harvested about 4 - 5 months after stem
emergence
 Production is year-round, the greatest number of flowers is
produced during the summer months

15. Red ginger is often heavily
infested with ants, aphids,
soft scales, and mealybugs

16. Postharvest life

17. Postharvest life
 Postharvest life is increased by use of floral preservatives
containing 2% sucrose and 8-HQC (8-hydroxyquinoline
citrate), antitranspirants, or simply precutting the stems
 Hot water treatment of red ginger at 120–122°F for 12–15
minutes extends postharvest life, kills most of the pests
that infest red ginger, and reduces the geotropic response

18. Grades and standards
 For Hawaii Standard grade, an
inflorescence length of 6 inches
is preferred. The cut end of the
stem should be a minimum of 3/8
- inch diameter

19. Storage
 Store red ginger at 54.5–59°F, making sure that the flowers do
not exhibit chill damage symptoms such as off colored
(grayish or bluish) blooms.
 The inflorescence has a strong geotropic response and should
be stored upright in water to avoid bending. A holding solution
of 2% sucrose (w/v) is recommended.
 To maintain the best quality, the relative humidity should be
greater than 90%.

20. Packing
• Allow flowers to air-dry before packing
• Red ginger stems are packed flat, singly or bunched, in
standard or insulated fiberboard boxes or cartons. Single
stems are layered in rows in the box.
• Bunches may be wrapped in a polyethylene film, or
moistened, shredded newspaper may be packed around
the bunches, with unshredded newspaper separating the
layers.

21. Shipping
 To prevent geotropic bending during shipping, it is
preferable that the boxes be kept upright, so that the
stems are in a vertical orientation
 Holding temperature should be no lower than 59°F

22. Reference
 Production technology of commercial flowers, L. C. De
 Advanced Commercial floriculture, S.K. Battacharjee & L.C. De

23. THANK YOU