DandelionsDandelions are a common spring flower.Spring is really here – the dandelions are in bloom. This ubiquitous yellow flower seems to spring up overnight to create a cheerful floral display followed by billowy seed heads floating on long stalks above the ground. The word "dandelion" means "lion's tooth," probably a reference to its jagged leaves. Even though it's originally from Europe, I rather like this tongue-in-cheek description of it's origin: "The dandelion has no origin; rather, its seeds came into existence at the Big Bang and dispersed through all the dimensions of spacetime, like background radiation and logic."

Dandelions in bloom.Taxaracum officinale, a common plant of grassland and cultivated ground, is found in all parts of the Northern Hemisphere thru USDA Zone 3. Depending on your perspective, dandelion is either a weed or wild vegetable that is more nutritious than broccoli and spinach. Though never cultivated as vegetables in Europe, they were brought to market in England in the 19th century when lettuce and endive were scarce. And dandelions appear on the menu in some locations. In Catalonia pheasant or duck is often prepared with dandelions in the fall (el faisà o l'ànec amb queixals de vella) and in Macedonia Radíkia Me Rízi Tis Kyrías Agápis is a dish of dandelion and chicory cooked with rice and pine nuts.

Dandelion is a short-lived perennial and a good colonizer that is excellent at dispersing its prolific seeds. Each plant can produce up to 20,000 viable seeds. The seeds have a pappus, the feathery parachute of soft, white hairs that makes it easily carried by the wind. Even though its flowers are more conspicuous early in the season, it will bloom almost throughout the year. 

Dandelion flowers are commonly visited by bees and other pollinators for the nectar. The flowers are utilized by bees and other pollinators (insects can see UV light which we can't: see how insects see a dandelion flower), and the rosette of leaves can be a food plant for the caterpillars of some butterfly and moth species. 

 

Dandelion seeds are dispersed on the wind.
A dandelion seed head.
Dandelions have a long taproot.Dandelion can also reproduce vegetatively from pieces of tap-root, with the upper sections of the root having greater viability. The deep tap-root, up to 3 feet long (but usually 6-12"), allows it to survive drought and competition with other weeds. The stem contains milky latex sap.

Cultivation!!!

Dandelion in the vegetable garden at the Montreal Botanic Gardens.Most people are less than enchanted with dandelions – particularly when they're more numerous than the grass in a home lawn. But this plant is actually cultivated in some places, and used for both food and herbal remedies. Dandelion is amongst the hardiest of perennials, and will grow just about anywhere, regardless of soil conditions, but rich soil will improve its growth. They withstand frost and freezes and tolerate crowding. Heat and insufficient moisture will cause the leaves to get bitter, but it won't kill the plant.

Dandelion seedling.Should you actually want to grow dandelion intentionally, sow the seeds on the soil surface or slightly covered from early spring (4-6 weeks before last frost) through late summer. They should germinate in ten days at 55 ºF. Space the plants six to nine inches apart in rows twelve inches apart. You can also get a head start by sowing in early spring in a cold frame or indoors, then transplanting the seedlings into individual pots when they are large enough to handle (but use a pot deep enough to accommodate the tap root), and then plant them out in early summer. It's essential to pick the flower heads, not only to keep the plant's energy going to root and leaf production, but also to spare yourself future weeding. Your crop should be ready in 85 to 95 days. But check your local regulations before sowing your crop; in some places (e.g. Pueblo, Colorado) it is illegal to grow dandelions! 

Commercial seed is available, but difficult to find in the U.S. It's probably easiest to just harvest your own seed from plants in your own yard or a neighboring field. There is even a variety called "Thick-Leaved"  which does, as the name suggests, have thicker leaves than the wild type; and there supposedly are some other named varieties with larger, more tender and less bitter leaves (but I couldn't find these names). 

Medicinal Value

If you believe herbal medicine reports, dandelion is a virtual pharamcological wonder with properties to cure everything from acne to yeast infections. The latex-containing sap is a styptic and combats acne, boils, diabetes, eczema and warts, while preparations of the leaves or roots are purported to be a non-potassium depleting diuretic (supposedly as effective as Lasix®) useful for treating fluid retention, cystitis, nephritis, and hepatitis, and obstructions of the bladder, gall bladder, kidney, pancreas and spleen obstructions, as well as for snakebites, colon cleansing, nonspecific heart distress, and cooling energy (to "cool out excess liver functions"). Plus it protects against cirrhosis of the liver and cancer! Some caution is recommended: due to high potassium content those with diabetes mellitus, kidney problems or taking ACE inhibitors should not take this herb. Also, some people may be allergic to dandelions. If you're allergic to latex you should also avoid handling fresh dandelions because of the latex in sap.

Eating Dandelions

Nearly all parts of this plant can be eaten. Regardless of which part you intend to eat, make sure the dandelions have not been treated with chemicals and wash them thoroughly to remove all soil and insects from the underside of the leaves or roots. Dandelion greens are very nutritious. The leaves, which are are high in calcium, potassium, and iron, are best when they are young and tender, and are most flavorful in early spring before the first flower buds appear. They can be consumed fresh or cooked in boiling water for 10 minutes to take away some of the bitterness (especially leaves from mature plants). Or dress the greens with lemon to reduce the bitterness. The slightly bitter young dandelion leaves make a good substitute for chicory, arugula, escarole or curly endive or for cooked spinach.  

Dandelion roots can be eaten as a vegetable.The roots can be eaten as a vegetable with a turnip-like flavor if dug in early spring. The outer skin is very bitter, so be sure to peel them first. Boil, then drain, then cook and season the roots as you would carrots. Dried and roasted 2 year old roots can be used as a caffeine-free coffee substitute. Be cautious of ingesting too many roots as they are reported to be both a diuretic and a laxative.

A dandelion blossom.Blossoms, too, can be eaten fresh, and are sweetest when picked early in the season.  They should be used immediately after picking because the flowers will close up quickly. The flowers can also be used to make wine, tea or jelly, or young buds can be boiled, pickled, sautéed, or cooked in fritters. Or try them in the following recipes:

Dandelion Salad

1 Tbsp vegetable oil                             
1 tsp cider vinegar or lemon juice       
2 cups young dandelion leaves           
1/4 cup sliced green onions
2 hard-cooked eggs, sliced
1/2 cup grapefruit sections
dandelion blossoms, optional

In a small bowl combine oil and vinegar. Combine the dandelion leaves and onions; add dressing, and toss to coat. Arrange on two salad plates and top with eggs and fruit. Garnish with blossoms if desired.

Dandelion Jelly

2 cups dandelion blossoms
1 quart water
1 package (1.75 ounces) powdered fruit pectin
5½ cups sugar
2 Tbsp orange extract
4 to 6 drops green food coloring, optional
In a saucepan, bring dandelion blossoms and water to a boil; boil for 4 minutes. Drain through damp cheesecloth, reserving 3 cups liquid and discard the flowers. In a large kettle, combine dandelion liquid and pectin; stir well. Bring to a full rolling boil over high heat, stirring constantly. Add sugar, and return to a full rolling boil. Boil for 1 minute, stirring constantly. Remover from heat and add extract and food coloring if desired. Skim off foam. Pour the hot liquid into hot sterilized jars, leaving ¼ inch headspace. Put on lids and process in a boiling water bath for 5 minutes. Makes about 6 half pints.

Dandelion Omelet

¼ cup unopened dandelion buds
¼ cup chopped sweet red pepper
2 Tbsp butter, divided
4 eggs
½ tsp water
½ cup shredded cheddar cheese
salt & pepper to taste
dandelion blossoms, optional
In a 6-inch nonstick skillet, sauté dandelion buds and red pepper in 1 Tbsp butter over medium heat for 3 minutes. Remove and set aside. In the same skillet, melt remaining butter. In a small bowl beat eggs, water, and salt & pepper if desired. Pour half of the mixture into the skillet and cook over medium heat. As eggs set, lift edges, letting uncooked portion run underneath. When the eggs are cooked, sprinkle with half of the cheese. Spoon half of the dandelion mixture over one half of the eggs; fold omelet in half. Garnish with dandelion blossoms if desired. Repeat procedure for remaining eggs, cheese and dandelion mixture. Makes 2 servings.

Controlling Dandelions

Dandelions are a common problem in unhealthy lawns.No matter how many dandelion leaves and flowers you pick to eat early in the season, this probably won't be sufficient to control their spread in your yard. Dandelions are generally only a problem in lawns that are not growing vigorously enough to out-compete the weeds. The first step in dandelion control is to create a thick, healthy lawn that will prevent dandelions (and other weeds) from getting started in the first place. Perhaps your lawn needs more fertilizer, or the soil is too compacted, or you have not been mowing the grass at the proper height. 

If you only have a few dandelions, mechanical control may be the best option. Use a digging stick or other garden tool that can be inserted into the ground along the dandelion root to pop the dandelion and at least 2-3" of its root out of the ground. Plants will regenerate from root pieces, particularly from the top half of the root, so try to pull as much of the root out of the ground as possible. 

Herbicides give good control of dandelions (left).Broadleaf weed killers, such as 2,4-D, dicamba, and MCPP, in the common "weed & feed" fertilizer mixtures will kill dandelions whenever the plants are actively growing. Spot treating individual plants that occur sporadically throughout the yard may be more effective than broadcast treatments in well managed lawns. Although late summer and early fall is the best time to control dandelions, spring applications of 2,4-D will have some effect. Dry granular formulations must be applied to wet grass and weeds; the material is only effective if it sticks to the leaves. Liquid formulations can be applied anytime, but choose a calm day so the material will not blow or drift onto other plants. Remember that broadleaf weed killers will kill many plants, not just weeds. Dicamba is absorbed through the root system of plants, so keep products containing this herbicide away from shallow-rooted trees and shrubs to prevent injury.  Regardless of the product, read the label and mix and apply according to the directions.

Roundup® or other formulations of glyphosate are not the best choice for dandelion control. The chemical quickly knocks back the leaves, but doesn't kill the root. The plant that regenerates often has a group of weak stems coming back from the root, that break off easily, making it even more difficult to dig out.

Susan Mahr, University of Wisconsin - Madison 

Brand names are listed only for reference. Such references are not intended as an endorsement by the University of Wisconsin - Extension over similar brands.

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