Plant Information

These are heat tolerant plants, that aren't particularly fussy and need little routine maintenance. They will perform best if an application of controlled release fertilizer is included at the time of planting. This applies to both landscape and container plantings. Supertunias are heavy feeders, but a single dose is usually sufficient for landscape beds in most climates. If you have a very long season, a second application of controlled release plant food should be considered for landscape plantings. In general, containers need to be fed more than landscape plants. Supertunias in containers will need to be fed more regularly to be their absolute best. A second application of a controlled release fertilizer can be applied about every two months to container plants, which will help. However, for the very best performance I find regularly applying water soluble fertilizer starting about two months after the containers are planted gives the best results.  These extra applications of plant food really makes a difference in performance through the summer.

If your plant begins to look open or a bit tired, an allover trim can be beneficial.  Use a sharp pair of scissors or pruning shears to trim back up to 1/3 of the volume of the plant. I pair any trim with a dose of water soluble fertilizer to provide instant energy to help kickstart new growth, branching and flowering. Your plant will take a week to recover from the trim, but the end result is a fuller plant with more blooms going forward. You may repeat the trim as needed through the season.

Use in hanging baskets, window boxes, landscaping and combinations planters.

Supertunia petunias are vigorous with slightly mounded habits that function as both fillers and spillers in containers.  They are also excellent landscape plants, best suited to be placed near the front of beds.  They have medium to large sized flowers.

Early Spring through Fall Finish. Standard PPP.

For all sizes of containers, pinch the liner 1–2 weeks after transplant; for containers larger than 6” and for hanging baskets, trim around the edge of the container as needed prior to spacing or hanging of the baskets. 

10-15 ppm Sumagic spray or 1-3 ppm Bonzi drench are effective at controlling growth. Apply as needed. Supertunia Minis may require higher rates of PGRs. Cold temperatures will also effectively control growth. -Supertunia Black Cherry is more susceptible to flower damage from chemical applications late in the crop cycle.

Good sanitation practices include keeping greenhouses clean at all times, eliminating weeds and debris, disinfecting equipment in greenhouses as often as possible and keeping hose ends off of the greenhouse floor. Good water management practices are critical for good, healthy plant growth.

-Requires high light in production. -Needs 250+ ppm fertilizer. -Watch pH and EC levels. -Mini Strawberry Pink Veined, all veined varieties and Bordeaux are more sensitive to cold. Keep above 50 F. -Cold temperatures also control growth. -Yellow growth tips often indicate iron deficiency caused by high soil pH. -Do not bring Supertunia petunias in too early as they finish quickly. -Many common problems with Supertunia can be avoided if proper crop timing and the appropriate environment are provided. -Supertunia Black Cherry is more susceptible to flower damage from chemical applications late in the crop cycle. -Cooler growing temperatures, high light levels, proper spacing and drier growing practices can be very helpful in managing plant size.