Touch-Me-Not


2 entries found.
Picture of Touch-Me-Not Touch-Me-Not
Common Name: Impatiens, Touch-Me-Not
Botanical Name: Impatiens walleriana (im-PAY-shenz WALL-er-i-an-a)
Decorative Life: Lasts 2-4 plus weeks or longer depending on environment.
Post Harvest Care:
  • Do better in the landscape if grown in mixes containing both a wetting agent and hydrogel. Application of proper growing media wetting agent just prior to harvest and sale can delay postharvest wilting time by about 33%.
  • Does not like dry conditions or direct sunlight. Antitranspirants tested did not reduce transplant shock of seedlings.
Harvest Instructions: Borch, Brown and Lynch (1998) showed that lower levels of phosphorus fertilization (up to 30 times less than normal fertilization schedules) can improve postharvest performance as measured by less wilting. Namely, they are more tolerant to drought. Plugs can be stored for 6 weeks in the dark (6 weeks in light) at 45F and subsequently grown into very acceptable plants and/or flowers. Ethylene applications in the form of Florel sprays (biweekly applications at 400 ppm) can prevent flower formation on stock plants which in turn results in increased cutting number and subsequent rooting. Growing in mixes containing compost can produce plants with better postharvest performance.
Family Roots:
  • One of only two genera of the Balsaminaceae (balsam family). As a result, it has few relatives other than impatiens of which there are about 850 species.
  • Native from Tanzania to Mozambique.
Personality:
  • Flowers are 2-3 inches across, composed of 5 flat, spreading petals, and are held above the foloage. Most cultivars are not fragrant.
Availability: Year-round.
Flower Color: White, pink, brownish-red, blue or red.
Storage Specifics: Chill sensitive, store above 55 degrees F. Plugs can be stored for up to six weeks at 50F if provided as little as 5 ft-c of light during storage. Storage temperatures for mature plants depend on the night growing temperature. For example, plants grown at 60F night temperatures stored better at 50-70F than those grown either at 50 or 70F night temperatures.
Tidbits:
  • Impatiens: from Latin, referring to the sudden bursting of the ripe seed pods when touched. Hence, one common name is "touch-me-not".
  • The American Academy of Allergy, Asthma and Immunology list this species as an allergy-safe pollen producing plant.
  • According to Jauron et al. (2000), fresh petals are edible. Can be used in salads, as garnish or floated on drinks.
  • Some favorite cultivars and their respective flower colors include 'Tioga' (multiple colors including red, cherry red and purple), 'Cameo Scarlet' (red), 'Cameo Light Pink' and the Dazzler, Super Elfin and Accent series, each with a wide range of flower colors.
  • Will generally do well in light levels at least bright enough to read a newspaper in comfort but more light (up to filtered full sunlight) would be better.
Recent Findings: Latimer (1991) showed that drought conditioning during production dereased lateral growth and plant/flower quality in the landscape. Snider et al. (2002) report that spraying 'Super Elfin Rose' and 'Dazzler Salmon' plants with 100 or 200 ppm of a natural lipid product (LPE) made them more resistant to water stress conditions. As of this writing, this product is not yet commercially available to the floral industry. If it becomes available, an announcement will be made in this website.
Picture of Touch-Me-Not Touch-Me-Not
Common Name: New Guinea Impatiens, Impatiens, Touch-Me-Not
Botanical Name: Impatiens hawkeri (im-PAY-shenz HAWK-er-i)
Decorative Life: Lasts 2-4 weeks or more depending on environment.
Post Harvest Care:
  • Hydretain applied to the growing mix at the time of sale delayed wilting.
  • Does not like dry conditions and the resulting water stress can induce flower drop. In addition, cultivars vary greatly as to water loss and time to wilt. For example, 'Anna', Malanie' and 'Danlight' wilted on average five days sooner than three breeding lines (RQ-105-4, RQ-130-1 and RQ-105-5).
Harvest Instructions: Plugs can be stored for 2 weeks in the dark (3 weeks in light) at 55F and subsequently grown into very acceptable plants and/or flowers. High nitrogen levels during production, especially in the ammonium form, can reduce postharvest performance. Ethylene applications in the form of Florel sprays (biweekly applications at 400 ppm) can prevent flower formation on stock plants which in turn results in increased cutting number and subsequent rooting.
Family Roots:
  • Member of the Balsaminaceae (balsam family), a family with only two genera. Therefore, New Guinea Impatiens have mostly relatives that are other impatiens, some 850 species of them.
  • Native from New Guinea eastward to the Solomon Islands.
Personality:
  • Flowers 2-3 inches across, composed of 5 flat, spreading petals, held above the foliage and most are not fragrant.
Availability: Year-round.
Flower Color: White, pink, brownish-red, blue.
Storage Specifics: Chill sensitive, store above 55 degrees F.
Tidbits:
  • Impatiens: from Latin, referring to the sudden bursting of the ripe seed pods when touched. Hence, one common name is "touch-me-not".
  • A very large genus with over 1000 species. Will generally do well in light levels at least bright enough to read a newspaper in comfort but more light would be better.
  • Consumers prefer bicolors over solid flower colors, red over pink and blush, red or variegated foliage over solid green and solid red over variegated foliage.
  • The American Academy of Allergy, Asthma and Immunology list this species as an allergy-safe pollen producing plant.
  • Some favorite cultivars and their respective flower colors include 'Cajun', 'Paradise', 'Pure Beauty' and 'Harmony' series, all with many colors and bicolors, 'Ovation Red', and 'Rhapsody' (purple). The following cultivar series come in almost all colors: 'Paradise', 'Pure Beauty', 'Pizzazi', 'Baby Bonite', 'Electra' and 'Tioga'. 'Tioga' is a double impatiens.
Recent Findings: Ter Hell and Hendriks (1995) noted that high levels of ammonium fertilization during production caused increased abscisic acid and decreased cytokinin levels resulting in increased bud drop and root damage after harvest.