Digitalis Grandiflora Mill
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Common Names: › Foxglove, Big-Flowered Foxglove Family Scrophulariaceae – Figwort family Genus Digitalis L. – foxglove Species Digitalis grandiflora Mill.– yellow foxglove Scientific Name › Digitalis grandiflora http://plants.usda.gov/java/profile? symbol=DIGR4 Eastern Europe › Digitalis purpurea The United States › Minneosta › Maine › Ohio › Michigan › Several Northeastern States (grandiflora) Ontario, CA Latitude Ranges › 3-85 Altitude › Sea level to 8,000 ft Site Conditions Plant Traits Special Considerations Sunlight Life Cycle -Deer resistant -Partial shade -Perennial -Non aggressive Soil conditions Ease of Care But will self-seed under -Requires well- -Easy favorable conditions drained media Height -Non-native -High fertility -1.5 to 3 feet -not native to North Spread -1 to 1.5 feet America - Native to *Tolerates a wide Bloom-time central and southern range of soil -Early summer Europe, Siberia and conditions, except for -Mid-summer Asia Minor very wet or very dry. Flower color -All parts of the flower Performs best in rich -Yellow are poisonous soil that is moist but Foliage Color -Dark green well-drained. U.S. Hardiness Zone Shape Special Uses -Zone 3 to 8 -cushion, mound or -Cut flower clump This species thrives in acidic soils in a range of habitats including open woods, woodland clearings, on moorland and heath margins, hedge banks, sea-cliffs, waste land, rocky mountain slopes and hedgebanks. It is common in disturbed sites, or on burnt ground Clump forming perennial Native to woods and stream banks in Central Europe Large, tubular, funnel- shaped, soft yellow flowers up to 2” long. Interior brown markings Finely toothed leaves that can reach a length of 10” and a width of 2” Early summer Mid-summer The leaves of Digitalis have been used as a cardiac herbal treatment since the 18th century Italians have used it to clean fresh wounds Increases the activity of all muscle tissues 3 types of Inflorescences Used open-pollinated plants (2 years old) Goal of the experiment: › Determine information to make it a seed propagated plant › Harvest seeds, clean, count and do germination studies. › Control group › Yarn used to show crosses on individual flowers to gather seeds Seed Collection Data › Seeds were collected in the beginning of March › Control group was started end of January Crossed Plants = Yarn color Total Number of Seeds Collected Digitalis (Dig) #7 x Dig #9 = #1 468 seeds collected (2 seed capsules) red Dig #5 x Dig #6 = Teal #1 704 seeds collected (3 seed capsules) Dig #7 X Dig #8 = Blue #2 240 seeds collected (2 seed capsules) Dig #3 x Dig #2 = Gray #1 & 2 348 seeds collected ( 2 seed capsule) Dig #8 x Dig #9 = Yellow #1 323 seeds collected (1 seed capsule) Dig #1 x Dig #2 = Blue 13 seeds collected (1 seed capsule) Dig #1 x Dig #3 = Red #1 & 2 215 seeds collected (2 seed capsules) Dig #1 x Dig #4 = Teal #1 243 seeds collected (1 seed capsule) April 19th, 2010 April 31st, 2010 Cross Germination Cross Germination Counts Counts #1 x #3 10/24 #1 x #3 14/24 #8 x #9 19/24 #8 x #9 21/24 #3 x #2 13/24 #3 x #2 21/24 #1 x #4 11/24 #1 x #4 16/24 #7 x #9 9/24 #7 x #9 18/24 #1 x #2 0/12 #1 x #2 0/12 #5 x #6 16/24 #5 x #6 22/24 #7 x #8 12/24 #7 x #8 18/24 Interesting History Clever Name Shade Tolerance Appeal Adds a great vertical element to the garden and containers Advantages › Shade Tolerant › Cut flower potential › Easily propagated › A lot of flower power Disadvantages › Whole plant is toxic › Could possible become invasive Propagate by seed, division or separation › Seed germinates best at 70 F to 75 F in humid conditions. › Will self-seed under favorable conditions. Divide in spring or fall, separating new plantlets from the crown. Media › Well drained media in 288 plug trays, 1 seed per plug Stratifying › Not necessary, keep seeds in refrigerator until ready to be sown Germination › 2 weeks Plug Stage › 4-5 weeks Growing On › 8-12 weeks Total Production Time › 14-19 weeks Genetic Improvement › Work on decreasing the toxicity of the plant or, instead, a marketing strategy that emphasizes the toxicity Continued Experiments › Garden performance of crosses › Measurements of inflorescences as they develop › Preferences of customers of short vs. inflorescenes Picture of Digitalis purpurea at the California Pack Trials 2010. http://www.uk-herbs.com/images/yelfx.bmp http://www.arkive.org/foxglove/digitalis- purpurea/range-and-habitat.html http://plants.usda.gov/java/profile? symbol=DIGR4 http://www.impgc.com/images/PlantPictures/ Digitalis%20purpurea.jpg http://www.mountainvalleygrowers.com/ digpurpureafoxglove.htm http://www.floridata.com/ref/d/digi_pur.cfm http://davesgarden.com/guides/pf/go/ 179911/ .