Plant Spotlights

What Are SuperCals? (And Why They're Built for Rain)

Sales Director & Design Expert · April 29, 2026

If you’ve ever walked into a garden center after a week of rain, you’ve seen it. Petunias that look beat up, blooms melted down, just not as appealing. And it’s not because they’re bad plants — they just weren’t built for that kind of weather.

So What Are SuperCals?

SuperCals are a genetic cross between petunias and calibrachoa, developed by Sakata Seed. The goal was simple: take the best traits of both plants and combine them.

✓ From calibrachoa → better rain tolerance, cleaner habit
✓ From petunias → larger blooms, more presence

Why This Matters

Traditional petunias:

✓ Struggle with extended rain
✓ Don’t like consistently wet conditions
✓ Have blooms that break down quickly

And in a retail setting — or your front porch — that affects how the plant looks. Not just how it grows.

The Real Problem With Rain

It’s not always the plant dying. It’s the flowers falling apart.

Petunia blooms:

✓ Hold water
✓ Get damaged easily
✓ Lose visual appeal quickly

So even if the plant is alive, it doesn’t look like it should.

Where SuperCals Fit In

SuperCals were designed to handle that exact issue. They:

✓ Hold up better in wet conditions
✓ Maintain structure through rain
✓ Recover faster after storms

They’re not immune to weather — but they’re much more resilient.

What About New Petunia Varieties?

To be fair, petunias have improved. Recent breeding efforts — highlighted by companies like:

✓ Dümmen Orange (Durabloom series)
✓ Ball Seed (Color Rush series)

have focused on stronger blooms, better weather tolerance, and improved recovery. And they’ve made real progress.

But Here’s the Reality (Right Now)

Even with those improvements: petunias still struggle in prolonged wet conditions compared to SuperCals. Especially during Indiana springs, where:

✓ Rain can linger
✓ Conditions stay saturated
✓ Blooms don’t get a chance to dry out

Where SuperCals Shine

SuperCals are ideal for:

✓ Rain-prone seasons
✓ Containers exposed to weather
✓ Situations where appearance matters day-to-day

They give you a more consistent-looking plant — even when the weather isn’t cooperating.

The Real Takeaway

SuperCals aren’t replacing petunias completely. But they solve a very specific problem: keeping plants looking good through rain. And in a season where weather is unpredictable, that’s a big advantage.

Hoosier Tip

If you have a covered porch or a sheltered spot, traditional petunias still earn their place — the rain damage is the issue, not the plant. But if your container sits exposed to the sky, plant SuperCals and stop worrying about the forecast.

Reference: Sakata Seed (SuperCal®) · Dümmen Orange (Durabloom®) · Ball Seed (Color Rush®) · GrowerTalks · Purdue University Extension · Michigan State University Extension — Indiana gardening