Petunias are the signature flower of summer — colorful, fragrant, versatile, and one of the most popular annuals for gardeners, landscapers, and home growers. Whether you’re planting vibrant flower beds, building professional-looking hanging baskets, or experimenting with different petunia series for shape and growth habit — this guide is your complete authority.

At Garden Starts Nursery, we grow tens of thousands of petunias each year and have first-hand experience with both seed-grown petunias and Proven Winners vegetative petunia plants. This blog combines our real growing methods, our planting formulas, basket spacing techniques, and proven combinations to help you grow breathtaking petunia displays at home.

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🌱 Where to Buy Petunia Seeds

✔ Regular packs:
https://www.trailingpetunia.com/search?q=petunia&options%5Bprefix%5D=last

✔ Bulk packs:
https://www.trailingpetuniabulkseeds.com/search?q=petunia&options%5Bprefix%5D=last

✔ Bulk Seed Packs (All):
https://www.trailingpetuniabulkseeds.com/

✔ Smaller Packs (All Seeds):
https://www.trailingpetunia.com

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🌼 Petunia Types: Seed-Grown vs Proven Winners Vegetative Varieties

There are two primary categories of petunias in the gardening world:

1. Seed-grown petunias

These include varieties such as:

• Wave Petunia

• Easy Wave

• Shock Wave

• Tidal Wave

• Ramblin

• Purple Wave (the original!)

• Many grandiflora, multiflora & spreading petunias

They are:
✔ Started from seed
✔ Affordable
✔ Available in mixes + single colors
✔ Great for baskets and beds
✔ Ideal for gardeners starting from scratch

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2. Proven Winners petunias (vegetative only)

Examples:

• Supertunia Vista

• Supertunia Bordeaux

• Supertunia Mini Vista

• Supertunia Royal Velvet

• Supertunia Honey
  and many others.

These varieties:
✔ Are propagated only through vegetative cuttings
✔ Cannot be grown true from seed
✔ Seeds are sterile or non-true
✔ Are patented cultivars
✔ Have controlled propagation rights
✔ Are known for self-deadheading
✔ Produce massive spreading growth

This is why you’ll never find real
❌ “Proven Winners petunia seeds”
Because they are not true to parent plant or sterile

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🌿 Our Real Planting Method at Garden Starts Nursery

When we plant hanging baskets, we use specific formulas that produce reliable, full, professional-looking results.

✓ For seed-grown Wave, Easy Wave, Shock Wave & Tidal Wave:

We plant:
4 plugs per 12" hanging basket

This ensures:
✔ quick root-to-soil colonization
✔ uniform spread
✔ full side-drape growth
✔ balanced bloom coverage

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✓ For Proven Winners Supertunia varieties:

We plant:
3 vegetative plants per 12" basket

Because these varieties:
✔ root more aggressively
✔ branch more densely
✔ self-deadhead
✔ spread faster
✔ grow larger

A Supertunia Vista basket with 3 plugs will outgrow a seed-grown basket with 4 plugs.
That’s the power of vegetative genetics.

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🧪 Pelleted vs. Non-Pelleted Petunia Seeds (Video Included)

We also have an educational video demonstrating seed differences:
Pelleted vs Non-pelleted petunia seeds:
https://www.youtube.com/watch?v=gv_-4SMsi20

Pelleted seeds:
✔ easier to sow
✔ easier to space
✔ ideal for beginners
✔ great for plug trays

Non-pelleted dust-like seeds:
✔ require steady hands
✔ require humidity control
✔ used more by experienced growers

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🌸 Best Petunia Series for Hanging Baskets

🌊 Wave / Easy Wave / Shock Wave / Tidal Wave

✔ classic spreading genetics
✔ great for sun exposure
✔ works well in mixed baskets
✔ budget-friendly vs Proven Winners

🌺 Supertunia (Proven Winners)

✔ largest blooms
✔ heaviest flowering
✔ outstanding weather performance
✔ thrives in windy & rainy conditions
✔ self-deadheading
✔ very vigorous

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🪴 Best Flowers to Mix With Petunias in Baskets & Beds

Petunias combine beautifully with:

• Lobelia (blue trailing contrast)

• Alyssum (fragrant white clouds)

• Verbena (clusters of color)

• Dusty Miller (silver accent foliage)

• Calibrachoa (mini-petunia-like flowers)

• Coleus (foliage contrast)

• Bacopa (delicate trailing white blooms)

• Dianthus (textured upright pops)

• Salvia (vertical structure)

• Nemesia (delicate pastel flowers)

These combinations create:
✔ texture
✔ vertical-horizontal balance
✔ color harmony
✔ fragrance dimension

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🧺 Petunias in Backyard Garden Beds

Petunias are stunning when used along:

• driveway edges

• mailbox gardens

• front-yard borders

• walkway trimming

• flower bed edging

• landscape tiers

They provide:
✔ huge color impact
✔ fast fill
✔ low maintenance
✔ drought tolerance once established

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💧 Watering, Fertilizing & Care

Petunias thrive with:

• full sun (6–10 hours daily)

• consistent watering

• steady feeding with bloom–formula fertilizer

Best fertilizers:

• Jack’s Petunia Feed (20-10-20)

• Proven Winners Water-Soluble fertilizer

• Any bloom booster balanced for annuals

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🌟 Why Petunias Will Always Be Top-Tier Garden Flowers

✔ long bloom window
✔ countless colors
✔ cascading growth
✔ strong fragrance (certain varieties)
✔ affordability in seed-grown types
✔ unbeatable performance in vegetative types

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❓ FAQ Section

Are Proven Winners petunias grown from seed?

No — they’re vegetative only and propagated by cuttings due to patented genetics.

How many petunias per hanging basket?

At Garden Starts Nursery:
✔ 4 seed-grown petunias per 12" basket
✔ 3 Proven Winners per 12" basket

Do petunias bloom all summer?

Yes — especially when fed and watered properly.

Are pelleted seeds worth it?

Yes — they are dramatically easier for beginners to work with.

What are the best petunias for huge baskets?

For the largest growth:
✔ Supertunia Vista varieties
✔ Easy Wave & Tidal Wave as seed-grown alternatives