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Growing Tips Self-cleaning no deadheading necessary, this is not necessarily true of all Petunias.
Late July and August is when plants should be at their best, but there is only one problem: The plants have run out of energy and the gardeners realize it too late to help the plants recover. This is especially true in raised containers and hanging baskets. Here is the best way to keep your Petunias in the Super category.
1. When you buy them in the spring, buy a slow release fertilizer to top dress the basket or container. If you plant your own basket, incorporate some of the slow release fertilizer in the soil as you plant. Follow the package directions.
2. In May fertilize with a water-soluble fertilizer once every two weeks. Mix up the fertilizer and water the plants just like you would if you were using clear water. It normally takes a good half of gallon of water
To really water a 10" wide basket or raised container.
3. In June as the weather starts to get warm to hot, fertilize weekly, again with a good soaking. If the weather turns really hot as it sometimes does in
Late June you may need to fertilize every third watering. By now the Supertunia is really growing and starting to tumble down from the basket or fill out across the flowerbed.
4. July is when the cutting back occurs. Around the 4th of July, (after your big party) get some of the slow release fertilizer that you bought in spring and re-apply across the top of the planter. At the same time, trim back
some of the longer branches just enough to bring the plant back in line with the bottom of the pot or basket. Don't remove too much at the maximum cut back 20% of the branches or 1 in five shoots. You can also just give it a general light trim. Your plant will be out of flower for a few days, but will come back stronger than ever. By now with July's heat you should be watering at least every other day and begin to fertilize every other watering. I know it sounds like a lot, but if you want a plant to grow like an elephant and be the most it can be, you got to feed it like an elephant!
5. August is, hot, humid, & sometimes with monsoons. Keep up the water and fertilizing, and again, if the plant starts to look straggly remove a few more branches but never more than 20% or give it a general trim as before.
6. It is September and the plants should still look good, start to back off the watering and the feed, but shape the basket with the last pruning of the season.
I know it sounds like a lot of work, but it really is a labor of love. I fertilize my baskets and my garden every time I water, and I water daily from mid July through August. I recently invested in the WaterWise irrigation system and let me tell you it really works. You will find that your Supertunias, along with all the rest of your plants will keep looking fantastic through September and perhaps with the luck of a gardener and a late frost maybe even into October.
Exposure Full sun
Height 16-24"
Spacing 18-24"
Hardy Temp 30°F
Zone(s) 10
Uses Use in large combinations and landscapes
Features Vigorous, mounding plants are perfect landscape fillers; blooms all season; low maintenance
Awards Won
2010 - Top Performer -Cincinnati Zoo and Botanical Garden 2010 - Top Performers -Mast Arboretum 2010 - Top Performer -Powell Gardens 2010 - Very Good -Massachusetts Horticultural Society at Elm Bank 2010 - Top Consumer Choice -Ohio State University - Columbus 2010 - Excellent -Disney 2009 - Gold Medal -Champaign County Illinois Master Gardener Idea Garden 2009 - Gold Medal -Champaign County Illinois Master Gardener Idea Garden 2009 - Honorable Mention -Texas A & M - East Texas Bedding Plant Trial 2009 - Top Performer -Mississippi State University 2009 - Best Performer -Sawaya Garden Trial 2009 - Best Performer -Colorado State University 2009 - Best Performer -Kansas State University 2009 - Best Performer -University of Tennessee - Jackson 2009 - Best Performer -University of Tennessee - Knoxville 2009 - Best Performer -Michigan State University 2009 - Top 10 -University of Minnesota - Morris 2009 - Top 10 -University of Minnesota - Grand Rapids 2009 - Leader of the Pack for Summer -North Carolina State, JC Raulston Arboretum 2009 - Leader of the Pack - Late Summer -North Carolina State, JC Raulston Arboretum 2009 - Leader of the Pack - Early Season -North Carolina State, JC Raulston Arboretum 2009 - Best of Breed - Summer -North Carolina State, JC Raulston Arboretum 2009 - Gardener's Pick -South Coast Botanic Garden 2009 - Top Performer summer -Michigan State University 2009 - Top Performer - Late Summer -Michigan State University 2009 - Top Performer -University Laval 2009 - Best Friend Forever -Virginia Tech 2009 - Top Performer -Ohio State University Extension - Springfield 2009 - Top Performer -Kansas State University 2009 - Prairie Star -Kansas State University 2009 - Best Varieties -Penn State 2009 - Top Performer -Norfolk Botanical Garden 2009 - Excellent Rating -Boerner Botanical Garden 2009 - Top 20 -Cornell University 2009 - Best-Looking Flowers -University of Delaware 2009 - People's Pick Honorable Mention -Oregon State University 2009 - Top Picks -BYU-Idaho, Thomas E. Ricks Demonstration Garden 2008 - Top Performer -Longwood Gardens 2008 - Excellent Rating -Boerner Botanical Garden 2008 - Top Peformer -Penn State 2008 - Top 10 -Cornell University 2008 - Top Performer -Ohio State University Extension - Springfield 2008 - Top Performers - Foliage -University of Delaware 2008 - Top 10 -Delaware Valley College, Henry Schmeider Arboretum 2008 - Best Overall Impression -Oregon State University 2008 - Most Consumer Appeal -Oregon State University 2008 - Top Performer -Oklahoma State University Botanical Gardens 2008 - Top Performer in Ground -Kansas State University 2008 - Top Performer in Ground -Colorado State University 2008 - Best of Trials -University of Florida 2008 - Silver Medal -Ohio State University Extension - Springfield 2008 - Top Performer -University of Georgia 2008 - Top Performer -Linnaeus Teaching Garden 2008 - Top Performer -University of Minnesota 2008 - Exceptional Rating -University of Georgia 2008 - Leader of the Pack Summer -North Carolina State, JC Raulston Arboretum 2008 - Leader of the Pack Summer - Late Season -North Carolina State, JC Raulston Arboretum 2008 - Leader of the Pack Summer - Early Season -North Carolina State, JC Raulston Arboretum 2008 - Top 10 -University of Minnesota-St. Paul 2008 - Top 10 -University of Minnesota - Grand Rapids 2008 - Knock Your Socks Off -University of Georgia 2008 - Top Performer -Michigan State University 2008 - North Texas Winners Circle -Texas A & M - East Texas Bedding Plant Trial 2008 - Best Overall -Cornell University 2008 - Best Petunia -Cornell University 2008 - Top Performer -Oklahoma State University Botanical Gardens 2007 - Top 10 -University of Minnesota - Grand Rapids 2007 - Top 10 -University of Minnesota - Morris 2007 - Top 10 -University of Minnesota-St. Paul 2007 - Top Rated Performer -City of Cedar Rapids 2007 - Best of Trials -University of Florida 2007 - Best In show -Ohio State University Extension - Springfield 2007 - Outstanding Performer -Texas A & M - East Texas Bedding Plant Trial 2007 - Top Performer -University Laval 2007 - Top Performer -Ohio State University Extension - Springfield 2007 - Top Performer -Longwood Gardens 2007 - Top 10 -North Carolina State, JC Raulston Arboretum 2007 - Leader of the Pack Summer -North Carolina State, JC Raulston Arboretum 2007 - Leader of the Pack Early Season -North Carolina State, JC Raulston Arboretum 2007 - Leader of the Pack Late Season -North Carolina State, JC Raulston Arboretum 2007 - Best Spreading Petunia -Colorado State University 2007 - Top Consumer Choice -Ohio State University - Columbus 2007 - Top Performer -Ohio State University - Columbus 2007 - Silver Medal -University of Illinois-Champaign County Master Gardeners 2007 - Best of Trials for Spring -University of Florida 2007 - Top Performer -Kansas State University 2007 - Prairie Star -Kansas State University 2007 - Best of the Zoo -Cincinnati Zoo and Botanical Garden 2007 - Top Performers -University of Minnesota 2006 - Top Performer -Michigan State University 2006 - Gold Medal -University of Illinois-Champaign County Master Gardeners 2006 - Best of the Best -University of Georgia 2006 - Gardeners Choice -University of Guelph 2006 - Top Performer -Jardin Daniel A. Seguin 2006 - Best Varieties -Colorado State University 2006 - Superior Variety -Penn State 2006 - Top 20 -Missouri Botanic Garden 2005 - Top Performer -Missouri Botanic Garden 2005 - Best of Class -City of Cedar Rapids 2005 - Outstanding Rating -Disney 2005 - Top 10 Annuals -University of Minnesota - Morris 2005 - Outstanding Rating -Boerner Botanical Garden 2005 - Top Performer -Ohio State University - Columbus 2005 - Top Performer -University of Maine 2005 - Visitors Choice -Cornell University 2005 - Top Performer -University of Guelph 2005 - Top Performer -Colorado State University 2005 - Best of Show -Colorado State University 2005 - Best Petunia (Spreading) -Colorado State University 2005 - Best in Show -Ohio State University Extension - Springfield 2005 - Best New Variety -Ohio State University Extension - Springfield 2005 - Top 5 Performer -Ohio State University Extension - Springfield 2005 - 12 New Annuals -People, Places and Plants 2005 - Top 25 -Cornell University 2005 - Top Performer -Turtle Bay 2005 - Top Performer -Oklahoma State University Botanical Gardens 2005 - Top Performer -Penn State 2005 - Top Performer -Kansas State University 2005 - Leader of the Pack Early Season -North Carolina State, JC Raulston Arboretum 2005 - Leader of the Pack Summer -North Carolina State, JC Raulston Arboretum 2005 - Leader of the Pack Late Season -North Carolina State, JC Raulston Arboretum
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