Always apply the fertilizer as is mentioned on the back of the product. For tips on how often to fertilize the flowers and how to prune them, keep reading! The young stalk is still relatively fragile at this point, so as it continues to grow, you should start adding a little bit of soil. Lauren Kurtz is a Naturalist and Horticultural Specialist. If you have just taken the pot out from a shed that you haven’t entered in a while, you should clean it thoroughly. Many varieties would do well in a 12- to 14-inch diameter pot which is also at least 12 inches deep. You can count on these powerhouses to produce abundant blooms from summer through fall – with some producing up to 40 flowers per plant! The process for growing dahlias in pots is a bit different from growing them in the ground. wide (15-20 cm), feature elongated velvety petals that curve elegantly towards the face of the bloom. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. Dahlias make luxurious cut flowers and as perennials, they are normally planted in the ground. Luckily dahlias are not demanding, but Rowe recommends using a balanced fertilizer (10-10-10 or 15-15-15) and feeding the plants once per year. If there is a sprout, also known as the eye of the tuber, you should keep it facing toward you. Cut past the two side buds down to the next branching part of the plant, or the next "Y" in the steam. You need to then fill the container at least one-third of the way, and then lay down your tuber. Use quality soil to grow healthy dahlias. Another must-have according to the expert? With a glorious dark foliage set against masses of apricot-pink flowers that have a small red ring surrounding their dark-brown centers, Dahlia 'Happy Single First Love' is a particularly striking Dahlia. References Eventually, you’ll plant your dahlia tuber about 4 to 6 inches (10 to 15 cm) deep, and you’ll want to leave 1 inch (2.5 cm) between the surface of the soil and the rim of the pot at the end of the planting process. Join now and start creating your dream garden! Dahlias are perennial in U.S. Department of Agriculture plant hardiness zones 8 through 10. While it might seem hard, you shouldn't save every bud. wide (10 cm) blend nicely with other plants and add welcomed color and form to the late summer and fall borders. Single Dahlias feature blooms with a single row of flat or... Anemone Dahlias feature an outer ring of flat ray petals... Pompon and Ball Dahlias feature relatively small, fully... Use our interactive toolsto design your dream garden. For the largest varieties, go with a 24 by 24 inch (61 by 61 cm) pot, which usually holds around 25 gallons (95 L) of soil. Planting in Pots. Ideas with Dahlias, A Desirable Summer Border Idea with Grasses, Dahlias and Amaranth, A Spectacular Summer Planting Idea with Dahlia, Zinnia, Chinese Aster and Ammi visnaga, A Desirable Summer Border Idea with Grasses, Dahlias and Agastache, A Glowing Summer Border Idea with Dahlias, Helenium and Nepeta, A Late Summer Border Idea with Dahlias, Helenium and Persicaria, A Charming Late Summer Garden Idea with Japanese Anemones and Mountain Fleece, Best Dahlias For Containers and Low Borders. Start by filling the pot with well-draining garden soil that is moist, but not wet. Remove the lower leaves in July to help air circulation and feed with tomato food once a week (at half strength). Rowe suggests adding good soil around the tuber or transplanted plant to improve drainage. Dahlias like the loose soil, so it’s best to let it be that way. Favorite of many garden enthusiasts, the delicate Mignon Dahlia 'G.F. If you plant them outside in May they will be flowering by the middle of June. Put them in a cardboard box and store them in dry, cool conditions, such as an open basement with good air circulation. If you live in a colder climate and want your dahlias to bloom earlier, you can plant them indoors... Care and Maintenance. If they're drowning in water, gently pour some of the water out. Container size should be no smaller than 12” x 12” per tuber (30 x 30 cm). Mix … Larger varieties include Hadrian’s Sunlight and Twyning’s After Eight, which grow 4 feet (1.2 m) or higher. They are, "This article provided lots of useful information. They were all beautiful blooms and different colors. With an attractive dark bronze to black foliage set against masses of canary yellow flowers, Dahlia 'Happy Single Party' is worth growing. Thanks. "Make sure the container has good drainage holes in the bottom so the water passes through the pot and doesn't collect." However, dahlias can thrive in large containers; tall varieties also need a stake for extra support. There might be hidden insect eggs, especially if the pot has been left untouched for a long while. Dahlias like full sun, though don't like to get searingly hot. Dahlias grow well in pots, though you need to be very careful not to let them repeatedly dry out. They also will need to be regularly fertilized during the growing season, and many will need to be staked so they don't fall over. For containers and low borders, the best choices are the shorter dahlias with more compact shapes. She earned a BA in Environmental and Sustainability Studies from Western Michigan University in 2014. You need to select one that best suits your space. You can store the tubers in a variety of containers – milk crates, plastic bins, paper bags, and cardboard boxes all do the trick. Then, moisten it just a bit before putting it in the pot. 'Fabula' is a dwarf Collarette Dahlia which belongs to the lovely Impression Series primarily bred for bedding and for use on balconies and patios. The best way to water the plants is to make use of a watering can instead of blasting it hard with a hose in your garden. Get inspired to make your porch your new favorite living space with these ideas designed to add a refined look to any outdoor space. When looking for a container for the dahlia, look for one in which the tuber can be … Award-winning Dahlia 'Sunshine' is a particularly striking Dahlia with its golden yellow flowers with orange centers atop a mahogany fern-like foliage. All Rights Reserved. Many nurseries also sell dahlias already started in containers. Dahlia 'Impression Fuego' will add sparkles to your summer garden with its bright red petals adorned with a ring of golden tiny petals at their heart. There are plenty of online gardening stores that sell dahlia tubers, or you can visit your local gardening center for growing them in a container. Don't allow too many buds. Now that the stalk has grown beyond the rim of the pot and there is considerable foliage on your dahlia plant, you should change your watering routine. ", starting to grow nicely; was not sure how big a pot to put them in, but the advice was great and I know what to do now. Blooming massively from July until Frost, this dahlia grows up to 12-20 in. You need to tie it at intervals of one foot so that it remains in place. Fertilizers that have a higher amount of nitrogen are ideal for use at the start of the season, and you can then continue to reduce the nitrogen levels by selecting different kinds of fertilizer over the passage of time. For most dahlias, you want a fairly large pot, though it doesn't need to be very deep. All you need is your favorite garden trowel to dig a big enough hole for your tuber or transplant. Credit: There are certain species of dahlia that can grow as high as five feet, so if you are going to grow these, you will want to choose a bigger pot.