Petunia Hybrid ‘Supertunia White Russian’

A how-to production guide

With a dark chocolate eye and veins paired against antique white petals, Proven Winner’s Supertunia White Russian presents quite a beautiful and unique coloration. This heat- and drought-tolerant annual doesn’t require deadheading, and is attractive to butterflies and hummingbirds. With a garden height of 6 to 10 inches, the petunia has a trailing habit of up to 36 and spreads between 24 and 36 inches. It is great for both containers and landscapes.

  • Supertunia White Russian requires a hardy temperature of 30°F and is hardy in Zones 10a, 10b, 11a and 11b.
     
  • The Petunia’s bloom time is from planting to hard frost, and requires sun for lighting.
     
  • Optimal pH level is between 5.5 and 6.8.
     
  • A 200 ppm balanced fertilizer, with an emphasis on nitrate forms of nitrogen instead of ammonia-based forms is recommended.
     
  • If you are buying them in the spring, use a slow-release fertilizer to top dress the basket or container. If you are planting them, incorporate some of the fertilizer into the soil while planting.
     
  • Use a water-soluble fertilizer every two weeks during the month of May. Mix up the fertilizer and water the plants as you normally would. A half gallon of water is usually needed to really water a 10-inch wide basket or raised container.
     
  • As the weather starts heating up in June, being to fertilize weekly with a good soaking. If extreme heat occurs, it may be necessary to fertilize every third watering. At this point the petunia should be tumbling from the basket or filling out across the flowerbed.
     
  • Apply slow-release fertilizer across the top of the plants during July. Give them at least a light trimming, but do not cut back more than 20 percent or one in five shoots.
     
  • With July’s heat, water the plants at least every other day and begin fertilizing every other watering.


Did You Know?
Deadheading is not necessary, although this is not completely true of all Petunias.

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