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Dahlias prefer sun on their roots, plus mulch harbors slugs. Wait until the sprouts have appeared above the soil, then water. Do not water the tubers right after planting.As the stem sprouts, fill in with soil until it is at ground level.Cover the tuber with 2 to 3 inches of soil.Do not break or cut individual dahlia tubers (as you would with potatoes).Set a tuber into the hole with the growing points, or “eyes,” facing up.It also helps to mix some compost and a handful of bonemeal into the planting hole. To plant the tubers, start by digging a 6- to 8-inch deep hole. Plant the smallest bedding dahlias, grown from seed, 9 to 12 inches apart.Plant medium- to low-height dahlias, usually in the 3-foot tall range, among other summer flowers.

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Plant large dahlias and those grown solely as cut flowers in a dedicated plot where they will be free from competition from other plants. Set tubers in rows spaced 3 feet apart. If you plant dahlias about 1 foot apart, they make a nice flowering hedge and will support each other.

Pink “eyes” (buds) or a little bit of green growth are good signs. Medium to dwarf-size dahlias will do well in containers.Īvoid planting dahlia tubers that appear wrinkled or rotten.

Some gardeners start tubers indoors in containers a month ahead to get a jump on the season.

Planting dahlias a few days after tomatoes are planted in the ground is a good rule of thumb.

Plant when the soil reaches 60✯ (15☌) and any danger of frost has passed. Amend heavy clay soil with aged manure or compost to lighten and loosen the soil texture for better drainage.

They grow best in rich, well-draining soil with a pH level of 6.0 to 7.5. Consider their size at maturity when planting.

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Learn how to dig up dahlias in the guide below.ĭahlias thrive in 6 to 8 hours of direct sun, especially morning sunlight, and they benefit from protection from wind. Luckily, cold-weather gardeners can also just dig up the tubers after the first fall frost and store them in their garage until spring. That said, some gardeners have had luck keeping the dahlias in the ground in zones 6 and 7. However, in colder regions (zones 7 and lower), dahlias are treated as annuals. In the U.S., they are considered a perennial in hardiness zones 8 and higher. Are Dahlias Perennials or Annuals?ĭahlias are tender perennials in their native warm climate of Mexico. Growing vegetables? Put a row of dahlias on the border, where they will not shade your edibles. Dahlias are perfect for a border garden and make lovely cut flowers. The tubers are planted in the ground in late spring (around the month of May) and generally flower from July to the first autumn frosts. Plus, dahlias grow in a wide range of beautiful colors, including white, yellow, orange, pink, dark pink, red, dark red, lavender, purple and black, light blend, bronze, flame, dark blend, variegated and bicolor!ĭahlia is a genus of tuberous plants that are members of the Asteraceae family. Picking a favorite dahlia is like going through a button box! The flowers can range in size from petite 2-inch lollipop-style pompoms to giant 15-inch “dinner plates.” Most varieties grow 4 to 5 feet tall. Learn more about planting, growing, and caring for dazzling dahlias in our dahlia gardening guide. The tubers are planted in late spring and the flowers will bloom continuously from midsummer through fall.

Optically ground and polished, the lens provides three power magnification at an 8 inch (20 cm) focal length.Dahlias are breathtakingly gorgeous flowers that come in every color of the rainbow. The 2 x 4” (5 x 10 cm) high resolution magnifier lens adds another dimension to this multi-purpose line of lamps.

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You can choose a Q Series lamp equipped with either two or four long wave Ultraviolet (UV-A) Blacklight 365nm tubes, with or without white light depending on your intensity requirements. The Q Series offers multiple models with various combinations of long wave Ultraviolet (UV-A) Blacklight 365nm, and White Light, giving you the ability to select a unit that’s ideal for your specific application. Lamps are equipped with heavy duty power cords with integrated strain relief ensuring added durability. A rugged phenolic handle is attached to the housing by a friction lock swivel joint for superior comfort and flexibility. All models have a built-in magnifier lens to allow you to observe even minute traces of fluorescence. They feature impact-resistant Polycarbonate housings enclosing a specular aluminum reflector that ensures maximum UV Irradiance. Spectro-UV’s Q Series Ultraviolet (UV-A) Blacklight 365nm Magnifier Woods Exam Lamps have been designed for maximum versatility and the widest range of applications.