Two to three weeks
Germinate seeds at 70-75F, then plant in 2-3 inch pots. Start seeds in early January.Plants require 2-3 months to reach transplantable size. Planting and Spacing: Artichoke should be planted 3-4 weeks before the frost-free date for your area.Artichoke requires cool temperatures to initiate the flower stalk. If planted too late, plants will not flower.Space plants 18 inches apart in the row, with rows 2-3 feet apart. Start the root divisions or seedlings in late winter to be ready for transplant outdoors 20 to 30 days before the last frost. If you are growing your own starts, germinate the seeds at 70 to 80 degrees Fahrenheit and expect sprouts in eight to 12 days. Start the seeds eight to 12 weeks before the last frost and keep the sprouts between 35 and 50 degrees Fahrenheit for the last 10 days to encourage flowering. Transplant outside when the soil temperature reaches 60 degrees Fahrenheit. If planting late in the spring, nursery starts are more likely to produce a good crop. When establishing the initial artichoke planting, growers see more success if they take into account how long it takes an artichoke to grow, getting the starts in the ground early enough to give the stalk the cold boost it needs to induc Artichoke seed plants are not fast starters, which is another reason for early indoor planting. Give your seeds a healthy start by planting two or three seeds in each 3-4 inch (9 cm) pot. Fill the pot 2/3 full of good quality, compost rich soil-based medium. It depends on the richness of your potting medium and the quality of light the plants receive. Ideally, germinating artichoke seeds do best under a controlled grow light, but they can do just as well in a warm, sunny window or a greenhouse for those fortunate enough to have one. How to grow Artichokes from seed. I grew these artichokes in only 8 months start to finish using a mild fertilizer 2-1-1 and some sea magic. Grown in Ashland Wisconsin 2013. 1  Howto & Style. 2  Standard YouTube License.  To begin germinating, artichoke seeds need a temperature around 70-75°F. (20°C.) and will take two to three weeks to sprout; another thing that should be taken into account when deciding when to start your artichoke plants. Once seedlings have sprouted, water them with a weak fertilizer solution at least once a week. It depends on the richness of your potting medium and the quality of light the plants receive. Ideally, germinating artichoke seeds do best under a controlled grow light, but they can do just as well in a warm, sunny window or a greenhouse for those fortunate enough to have one. Generally seeds take between 7 and 14 days to germinate. There are of course exceptions, some varieties can germinate within 2 days if con … ditions are right, where as others can take literally years to germinate-even if conditions are right. 15 people found this useful.  Artichoke plants are perennial and if they are in the right climate conditions — in zones 8 to 11 — they should produce flower buds for several years before needing to be replaced. From being sown, artichokes take about 150 up to 180 days to mature. However, just recently, a new variety of artichoke has been cultivated. That would depend on where you’re at and the variety of artichoke you are trying to grow. Typically, artichokes grown from seeds do not produce any buds during their first year. Or when they do, they are very small and of poor quality.
http://extension.usu.edu/files/publications/factsheet/HG-2003-03.pdf http://homeguides.sfgate.com/long-artichoke-grow-67727.html http://www.gardeningknowhow.com/edible/vegetables/artichoke/starting-artichoke-seed.htm http://www.youtube.com/watch?v=71Y-u7d-qME http://www.gardeningknowhow.com/edible/vegetables/artichoke/starting-artichoke-seed.htm http://www.answers.com/Q/How_long_do_seeds_take_to_germinate http://www.artichokerecipes.co.uk/how-long-will-it-take-to-grow-an-artichoke/
how long do artichoke seeds take to germinate