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Tennessee

Dahlia 'Harvey Koop' - Informal Decorative (1 tuber)

Dahlia 'Harvey Koop' - Informal Decorative (1 tuber)

Regular price $16.00 USD
Regular price Sale price $16.00 USD
Sale Sold out

Preorder for Spring 2025: We begin shipping in April (see details on the shipping tab below).

American Dahlia Society Classification (AKA - flower nerd talk)

Class: 1114 | Size: A | Form: ID | Color: V

Bloom Size: A, more than 8-10"

Height: 48"

What you're buying: A single tuber

 

Why Harvey Koop Dahlia is Our Favorite Fluff Monster

Bold, Streaked, and Absolutely Massive:
Harvey Koop is not here to be subtle. This giant dahlia can produce volleyball-sized blooms in a striking coppery bronze-yellow, streaked with deep wine-red. And just to keep things interesting, some flowers even sport back to solid red. Every bloom is a little different, making this variety a total standout.

A Legacy of Greatness:
Named after Harvey Koop—the once-largest dahlia grower in the world—this variety carries some serious history. A sport of the legendary Spartacus, it has the same towering presence, reaching 4-5 feet tall with sturdy stems that can handle its massive flowers.

Perfect for the Garden or Show Bench:
Whether you’re looking to impress in competitions, fill your garden with jaw-dropping blooms, or just grow something truly special, Harvey Koop delivers. It’s big, bold, and impossible to ignore—just the way we like our dahlias.

Plant it. Watch it tower. Let Harvey Koop steal the show. 🌻🍷

 

Spring Dahlia Tuber Shipping

New for 2025 Spring-Shipped Dahlias: Orders are shipped in the order received, not by zone. Pre-orders will begin shipping in April 2025 and should be completed by mid-May. No early shipping.

Rooted cuttings ship separately.

Guarantee

We guarantee our tubers are true to variety and ready to grow. We are so confident in our tubers that we offer a conditional warranty for the growing season. Click here to read the complete policy.

Customer Conduct Policy

We’re all about respectful and constructive communication—it’s how we ensure a positive experience for everyone in our growing community. If you have feedback or concerns, please reach out to us directly so we can resolve the issue promptly and fairly. We’re here to help, and we take pride in finding solutions that work.

That said, we reserve the right to refuse service, cancel orders, or void guarantees if a customer engages in disrespectful behavior. Over the years, we’ve seen too many growers face devastating challenges because of impatient or unfair actions, like airing complaints publicly on social media before giving the business a chance to address them.

Here’s the deal: If customer service matters are taken public before we’ve had a chance to help, we may choose to walk away and void guarantees. Likewise, if we see posts that are intentionally damaging or rude behavior toward other growers in the community, we reserve the right to decline your orders altogether.

We’re all in this together, so let’s keep it kind, constructive, and focused on growing beautiful things. 🌱

Grow & Care

Dahlias are tender perennials, vigorous and fast growing. Dahlia tubers must be lifted for the winter from the ground in zones 7 and lower.

Planting:

Dahlias require soil that drains freely. Clay soil should be amended. Planting in raised beds can help alleviate moisture concerns. Tuber loss due to moisture rot is the leading cause for plant loss.

Plant 6" deep. Dig hole at least twice the width of your tuber to reduce soil compaction. 

Label and stake your Dahlia at planting. Tubers do not need to be watered unless you are dealing with especially dry conditions. Whatever Mother Nature provides will be enough.

Care:

When Dahlias reach 10-12", the center tip should be pinched. This will create a bushier plan and yield more blooms. Without pinching, the plant will grow one tall, thick central stalk.

Your Dahlias will bloom from mid-summer until frost. Keep spent blooms trimmed and you'll enjoy repeat blooms all season long.

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