I’ve at all times had a tender spot for blue flowers within the backyard, regardless that most of them aren’t actually blue. However this one has blue within the title, and that’s sufficient for me.
Supertunia ‘Tiara Blue’ has a shocking violet blue all season, with a lighter lilac middle that provides depth to every bloom. It’s a part of the Supertunia collection, and it earned consideration rapidly after its launch for its spectacular blooming and flexibility.
That mentioned, Supertunias aren’t fairly as hands-off as some advertising and marketing would possibly recommend. They’re heavy feeders, they want constant solar, and so they profit from an occasional trim to remain full. However none of that’s troublesome. For those who perceive what the plant desires, you’ll don’t have any bother rising it.
Petunia hybrid ‘INPETTIABL’ PPAF Supertunia® Tiara™ Blue
What Is It?
Supertunia ‘Tiara Blue’ is a part of the Supertunia collection. It grows as an annual in most climates and is just technically perennial in zones 10 and 11. For the overwhelming majority of gardeners, it’s a one-season plant, however the quantity of bloom it produces in that single season makes it worthwhile.
Traits
The flowers are medium to giant with deep violet-blue petals that fade to a tender lilac on the middle. They’re produced constantly from planting till the primary laborious frost, and the plant drops spent blooms with out deadheading.
Crops attain as much as 12 inches tall and unfold 18 to 24 inches, with stems that spill over the sides of containers and hanging baskets. This twin behavior makes ‘Tiara Blue’ helpful as each a filler and a spiller together plantings. In panorama beds, it really works properly alongside the entrance edge the place the trailing stems can unfold with out being crowded by taller vegetation behind.
It attracts butterflies and hummingbirds, and is each warmth and drought-tolerant as soon as established. The mix of low upkeep necessities and season-long shade is why the Supertunia collection has grow to be as standard because it has.
Planting
Plant ‘Tiara Blue’ Supertunia open air in spite of everything danger of frost has handed and air temperatures are reliably above 45°F (7°C). The soil ought to be a minimum of 60°F (16°C) for the roots to determine properly. Mid to late spring is right.
House vegetation 12 to 24 inches aside in beds. In containers, a 12-inch pot comfortably holds one plant, or you possibly can mix it with different annuals in a bigger pot the place it would fill and spill naturally. For hanging baskets, one ‘Tiara Blue’ supertunia can fill a normal basket by itself as soon as it’s had a number of weeks to develop in.
At planting time, combine a controlled-release fertilizer into the soil or potting combine. This provides the plant a gentle baseline of vitamins and is very vital for container plantings the place vitamins leach out with each watering.
The right way to Develop
These vegetation are remarkably simple to develop. With minor consideration, they’ll look good all season lengthy.
Gentle
Six hours or extra of direct daylight is the minimal, and extra is best. Crops grown partially shade will produce fewer flowers and have a tendency to get leggy, with lengthy stems and sparse blooms. For those who solely have a spot that will get 4 to 5 hours of solar, the plant will survive however gained’t look something just like the images on the tag.
An east or west-facing place works properly for containers. South-facing is right in most areas, so long as the plant has ample water to deal with the additional warmth.
Water
‘Tiara Blue’ Supertunia is listed as drought-tolerant, which is true within the sense that it recovers properly from temporary dry spells. However for steady flowering, it wants constant moisture.
Within the floor, water when the highest inch or so of soil is dry. In containers and hanging baskets, anticipate to water extra incessantly, probably daily in the course of the hottest weeks of summer time. Hanging baskets particularly dry out quick as a result of they’re uncovered to wind and solar on all sides.
Water on the base of the plant when potential. Moist foliage sitting in a single day invitations fungal issues.
Soil
Any well-draining potting combine works for containers. Within the floor, reasonably fertile soil with first rate drainage is all it wants. Supertunias aren’t choosy about soil sort, however they gained’t tolerate soggy roots. In case your backyard soil stays moist after rain, raised beds or containers are a greater choice.
Temperature & Humidity
‘Tiara Blue’ Supertunia handles warmth properly. It’s one of many extra heat-tolerant petunias obtainable, which is helpful within the South the place many types wrestle in the course of the worst of summer time. It gained’t set flowers as prolifically when evening temperatures keep above 75°F (24°C), but it surely pushes by means of and picks up once more as situations average.
There’s no overwintering this plant open air in many of the nation, as frost will rapidly kill it. In zones 10 and 11, it might persist as a short-lived perennial, however even there it’s usually handled as an annual and changed every spring.
Common humidity is ok. Excessive humidity mixed with poor air circulation can encourage fungal points, which is why spacing and overhead watering matter.
Fertilizer
These vegetation are heavy feeders. A controlled-release fertilizer at planting time offers the bottom, however for one of the best flower manufacturing, complement with a water-soluble fertiliser each two weeks all through the rising season. Use a bloom-boosting formulation (one which’s increased in phosphorus than nitrogen) to encourage flowers over foliage.
In panorama beds with a protracted season, a second software of controlled-release fertilizer mid-season could also be price it. Container vegetation nearly at all times want extra feeding than in-ground vegetation as a result of vitamins wash out with each watering.
In case your ‘Tiara Blue’ Supertunia has loads of inexperienced development however not many flowers, inadequate feeding is the more than likely trigger.
Upkeep
Supertunias don’t require deadheading. What they do profit from is an occasional trim. By midsummer, the stems can get lengthy and sparse-looking, with flowers concentrated on the ideas and naked stems nearer to the middle of the plant.
When that occurs, reduce as much as a 3rd of the plant’s quantity with sharp scissors or shears. Pair the trim with a dose of liquid fertiliser to kickstart restoration. The plant will look tough for a couple of week, then push out bushy new development with extra blooms than earlier than.
You may trim extra usually if the plant is getting away from you, however by no means take away greater than a couple of third at a time.
Propagation
Supertunia ‘Tiara Blue’ is a patented selection (formally written as Supertunia®), which implies propagating it isn’t technically permitted for resale. It’s produced commercially from cuttings. It’s potential to do that at residence, however you’ll get much better flowers should you purchase new vegetation every year.
If you wish to give it a strive, begin by taking a chopping that’s six inches lengthy. Depart a number of leaves on the tip however take away leaves towards the underside of the chopping. Plant that in well-draining soil and watch for roots to develop.
Widespread Issues
The most typical problem with ‘Tiara Blue’ (and Supertunias typically) is poor flowering on a plant that in any other case seems wholesome. That is nearly at all times a feeding drawback. These vegetation want extra fertilizer than most annuals. For those who’re feeding them such as you’d feed a geranium, it’s most likely not sufficient.
Aside from that, there are a number of pests and illness considerations to be careful for.
Pests
Aphids cluster on new development and suck sap, forsaking sticky honeydew that may result in sooty mould. A robust spray of water from the hose often knocks them off. For persistent issues, insecticidal cleaning soap or neem oil works properly.
Tobacco budworm is the extra critical risk. These small caterpillars bore into unopened flower buds and eat them from the within, so that you’ll discover buds that fail to open or have holes chewed by means of them. Handpicking is efficient should you catch them, however the caterpillars are properly camouflaged.
Bacillus thuringiensis (Bt) utilized as a sprig will help, although budworms are notoriously proof against it in comparison with different caterpillars. Spinosad is a extra dependable natural choice for heavy infestations.
Thrips and spider mites can seem in sizzling, dry situations. Each trigger stippled or discolored foliage. Neem oil or insecticidal cleaning soap treats both, and bettering air circulation helps stop them.
Ailments
Botrytis blight (grey mould) is the most typical illness and reveals up as fuzzy gray-brown spots on flowers and foliage, often in cool, damp situations. Enhance air circulation, keep away from overhead watering, and take away any affected plant elements promptly.
Powdery mildew seems as white, powdery patches on leaves. It’s extra widespread when vegetation are spaced too carefully or in humid situations with poor airflow. Neem oil can deal with it, however correcting the situations that encourage it’s the higher long-term repair.
Root and crown rots occur when the soil stays too moist for too lengthy. There’s no actual remedy as soon as the roots are compromised. Prevention is the reply: well-draining soil, containers with drainage holes, and watering practices that allow the soil dry barely between waterings.
Incessantly Requested Questions
No. The flowers drop on their very own. This is among the benefits of the Supertunia collection over conventional petunias.
Virtually actually a fertiliser problem. Supertunias are heavy feeders and want weekly liquid feeding on high of a controlled-release base. Change to a bloom-boosting formulation with increased phosphorus should you’re utilizing a balanced feed.
Not in most climates. It’s grown as an annual all over the place besides zones 10 and 11. Plan on shopping for new vegetation every spring.
You could possibly strive, however petunias typically don’t carry out properly as houseplants. The sunshine ranges indoors are too low for sustained flowering, and the plant tends to say no. It’s less complicated and extra dependable to begin recent in spring.