Roberta's 4-pc. Over-the-Top Dahlia Extravaganza Collection

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Over-the-top delights. Enjoy more vibrant colors and richer floral displays than you ever thought possible with this extravaganza of beautiful dahlia flowers. The massive 8" flowers lift the look of your landscape throughout the summer. An ideal choice for your garden, deck, or sunroom. From Roberta's.

  • Type: perennial
  • Uses: ideal as container-grown plant
  • Shipped as: four dahlia tubers: one each of Avignon, Bodacious, Frost Nip, and Grand Finale
  • Zones: USDA hardiness zones 8 thru 11
  • Spacing: 18" to 24" apart
  • Exposure: full sun
  • Water: water thoroughly upon planting; wait until after sprouting to water again; keep moist during summer months
  • Fertilize: twice a month during summer months
  • Blooms/Fruits: mid-summer to early fall
  • Mature Height and Spread: 4'H with 18"W to 24"W spread
  • Winterize: after first frost, cut back to 6" above the ground
  • Resists: deer, rabbits
  • Drought Tolerant: no
  • Heat Tolerant: no
  • Fragrant: no
  • Edible: no
  • 1-year Limited Manufacturer's Warranty
  • Ships at the appropriate time for planting in your area
  • Cannot ship to AK, HI, PR, VI, Guam

Tune in to QVC for Roberta's Unique Gardens

Wednesday, August 31, 2016 from 2 – 3 a.m. ET

Important Details

Roberta's "Gotta Grow" Guarantee

When you are happy, we are happy. Roberta's assures your satisfaction for its perennials for 1 year and its annuals for 90 days from time of shipment. If for any reason your results don't match your expectations Roberta's will replace it with a similar or comparable plant at no charge. If your replacement is not available or it is too late in the season to ship, it will ship the following season.

About Roberta's

About Roberta's

For three generations, Roberta's has provided gardeners premium-quality bulbs and plants. These hard-to-find, yet easy-to-grow plants provide a welcome boost of color to any garden. Now, in addition to beautiful flowers and plants, Roberta's offers edibles such as figs, guavas, berries, and more to grow and enjoy.

Zone Finder

Don't know your zone?

Zone 11:

Ships Week of March 21st

This zone is the warmest, and refers to any region that seldom dips below 40°F. Zone 11 is considered to be frost-free.

Zone 10:

Ships Week of March 21st

Plants that love heat and humidity do very well in this tropical climate. Zone 10 receives plenty of rain, sunshine, and warm temperatures. Its average annual low temperature is 30–35°F.

Zone 9:

Ships Week of March 21st

This zone includes the thermal belt of California's Central Valley. In this growing region, gardeners don't worry about cold hardiness like they do in other parts of the United States. The bigger concern here is the summer heat. Weather in the thermal belt is affected by both coastal and interior weather patterns. Hot and very dry air is pushed in from the inland while the ocean provides cool and moist air. Plants that prefer cool and moist summers are difficult to grow in this region, whereas heat-loving plants thrive with minimal attention. Zone 9 has very hot summers, while winters have low temperatures ranging from 28–18°F, although frost is rare. Rain between November and April averages 2 inches per month. There's constant sunshine during growing season. Plants that do well in this area with full sun are butterfly bushes, lavender, black-eyed Susans, hibiscus, and sedum. Part-sun plants include honeysuckle, phlox, passion flower, hollyhock, and bee balm. Bleeding hearts would work great in shade.

Zone 8:

Ships Week of March 28th

This zone ranges 10–20°F as the average annual low temperature. Most parts of Zone 8 enjoy a temperate climate with mild winters. Summers are generally warm with cooler night temperatures. Due to the long growing season, this zone is home to many beautiful gardens. Although it's too warm for lilacs, many other plants from Zones 7 & 9 may actually do well here depending on the microclimate of your location. Suggested for some plants that should flourish in Zone 8 are angel trumpets, astilbe, bee balm, bleeding hearts, columbine, daylily, hostas, and butterfly bushes.

Zone 7:

Ship Weeks Vary by Location:

  • 7a ships week of 4/11
  • 7b ships week of 4/4

This zone has hot summers and mild, but pronounced, winters that sharply define the season without severe winter cold or enervating humidity. This zone also has a climate conducive to growing such plants as peonies, lilacs, and flower bulbs. In Zone 7, typical winter lows range from 35–26°F (2 to -3°C with record lows averaging from 18–0°(-8 to -18°C).

Zone 6:

Ship Weeks Vary by Location:

  • 6a ships week of 4/25
  • 6b ships week of 4/18

Warmer summers and cooler winters distinguish Zone 6 from coastal Zone 5. With a long growing season from 155 days at Cottage Grove to 280 days and 40–55 inches of annual precipitation in most places. If you live in Portland for example, it's among the mildest parts of Zone 6. Zone 6 averages 10–15°F (5–8°C) higher than those along the coast, while winters are the warm summers of this zone. The cold winters make this area exceptional for growing plants like peonies and plants that need at least 6–8 weeks of cold weather to grow and bloom properly.

Zone 5:

Ship Weeks Vary by Location:

  • 5a ships week of 5/16
  • 5bn ships week of 5/9
  • 5bs ships week of 5/2

Summer highs run between 65°–70°F (18–21°C) along the coast, and 70–75°F (21–24°C). Such mild temperatures are great for growing begonias. Steady breezes and lower temperatures, especially along the coast, make windbreaks and warm microclimates critical for heat-loving plants. Average January minimum temperatures range from 33–41°F (1–5°C), with annual lows averaging a few degrees colder.

Zone 4:

Ships Week of May 23rd

This zone has more cold than neighboring Zone 5, more snow, and a shorter growing season. Compared to neighboring zones in Alaska and Canada, however, it has less winter cold and a longer growing season. No zone grows better perennials and bulbs. Average winter lows in Zone 4 range from 34°–28°F with extreme lows averaging 8°–0°F. The growing season is 150–200 days long, but because Zone 4 summers are temperate (high average from the low 60s to the 70s), plants take more time to develop.

Delivery Date Estimate

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Reviews & Community QA

Roberta's 4-pc. Over-the-Top Dahlia Extravaganza Collection 2.3 5 89 89
disappointed these came in great shape took a while to grow ,but they were not the size of a dinner plate.so i waited to see this year if they would get bigger but to my saddness they did not regrow at all kind a waste of money . 05-16-15
LOVE THEM Ordered 8 bulbs last year and planted them in front of my front porch. Had fantastic remarks from neighbors and strangers. They bloomed the size of saucers last year, hope they get to expected plate size this year. Plan to plant them climbing 2 light posts this year. Only problem is having to dig them up every year. 05-06-15
Nothing I will wait a little longer but it looks as though the squirrels aren't even interested in digging them up so there is nothing for the deer to be bothered with. I am done with flowers on QVC...... 05-05-15
Dahlias dissapointing This is the second order of dahlias, the first just withered up and never grew. These I received and planted in pots. A lot were very withered, and some were wet and rotting upon receiving them. I threw the wet, mushy ones away, and planted the rest. Will wait and see. I have planted dahlias and stored them for years and don't know why these are the way they are. 05-02-15
Regret I ordered these last year and only three of them came up. They were gangly and unless you tie them up they don't look very pretty. You also only have a year to ask for a replacement which isn't right because I got them April 17 and now a year later they are just starting to come up but only two of them so it is past the year for me to be able to get the other two replaced. 04-29-15
Beautiful I purchased these last year. 3 of the four grew. I called Roberta's and they said they would send out a replacement. One did not come until a few days ago- which makes sense due to growing seasons. I only gave this 4 stars because they were not as over the top as the plants shown on QVC. Mine did well but they were not bigger than any other large Dahlia I have seen. I will try a different fertilizer this year and see if that helps. 04-27-15
Disappointed I was so excited to get these, but when I opened the box the bulbs were not even close to the size on the shown on the presentation. The Avignon bulb only had a small middle root and the two small roots on the side were dried and hanging buy a thread. The Grand Finale bulb was dried and had black spots on it. I planted them anyway, but do not have great expectations. 04-23-15
Terrible I followed the directions and planted these just as they told me to do and my flowers were small total plant was maybe 2 foot tall so disappointed would not order again way too much money for what you get 04-23-15
DISAPPOINTMENT, awaiting replacement I bought these last year they did not grow, I called Robertas for a replacement and I am waiting for them. Hopefully they will not disappoint again this year. If they do Robertas will not replace again. I will inform. 04-22-15
1 Bloom Just the worst, all I got was long stems that broke in a hard rain . Salvaged 1 Bloom purple lasted 2 days crumbled and died. My dinner plates were really bad just crusted and died they were in a diffrent bed. My Hedranges(?) Are 12 years old and last year was the only year with few blooms. Can't waste any more $$$. Sad sad sad 04-14-15
GIGANTIC BLOOMS I have ordered the Over the Top Dahlia's 4 times. Sometimes they grow huge and sometimes nothing grows, but the Bodacious. For some reason the Bodacious always grows with tons of blooms that are huge. People stop while walking or driving by just to ask me what they are and tell me how BEAUTIFUL they are. I dig them up every year and give them away to my friends and neighbors and they LOVE them. I plant these in my front yard on the fence line because they MUST BE STAKED OR TIED TO THE FENCE. The stems are hollow stalks and grow 4 ft tall and 4 ft wide like a shrub. Strong winds and hard rain will break these. 04-12-15
These Plants Are Amazing. I bought these last year. Did a lot of traveling over the fall and winter and did not get them out if the ground like I was suppose to. They are coming back up this year. I am in Tennessee and we had a bad period of ice and snow. I thought for sure they would survive. I was so excited to see the new growth. Not sure why there are bad ratings on these flowers. They were everything they advertised. I hope to get some pictures this year and add the Roberta's flower food. Customer service at Roberta's is also excellent and very helpful. Very excited about this years new growth and the strength of these plants. 04-04-15
  • 2015-05-29T14:44:53.761-05:00
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