A Sampling of Hellebores and Cool Weather Crop Management

Having trouble viewing this e-mail? Click HERE to see it on the web
News and commentary for the perennial market GrowerTalks MagazineGreen Profit Magazine

Tuesday, September 29, 2026

Paul Pilon Subscribe
 
Perennial Pulse
COMING UP THIS WEEK:

What's Happening Here?
A Sampling of Hellebores
Cool Weather Crop Management
The Answer is ...
e-GRO Alerts 


What's Happening Here?

Have you ever had flashbacks where you’ve seen something very familiar, but you didn’t actually know what you were looking at? I recently experienced one of these moments while doing some online research when I came across an issue I experienced back in the days when I was a perennial grower. 

Image by Jean Williams-Woodward. 
 
The image above is from a crop of hellebores. The problem I’m hopeful you’ll solve is the mottling and purplish spotting. Go into detective mode and really take a close look at the image. Do you see any "patterns” that could be important clues as to what’s casing this appearance?
 
I did manage to figure this out then and I’m hopeful that you’ll be able to solve this diagnostic challenge, as well. It’s time for me to ask, “What’s happening here?” Take a few moments while you read the next couple of articles to consider the possibilities and determine your final answer. Good luck!

A Sampling of Hellebores

I think growers often see cultural issues such as those shown above and assume the plants in the images are prone to issues. Like most plants, hellebores can experience a few cultural issues from time to time, but these problems don't define the beauty or general ease of production these plants typically provide. Let’s shift our focus to showcase the many beautiful appearances and options hellebores offer.

Frostkiss Dorothy’s Dawn
Frostkiss Elemental
 
North Star Ruby Heart
 
North Star Garnet Frills
Winter Delights Double White With Red Spots
 
Winter Delights Double Bicolor 
 
HGC Ice N’ Roses Mona Marble
Winter Ballet Katie
 
Winter Jewels Golden Lotus
Winter Jewels Sun Flare
 
This is just a very, very small sampling of the great hellebores varieties in the industry. I hope you like what you see and look into adding these beautiful plants into your perennial programs.

Cool Weather Crop Management

I can’t speak for the entire country, but here in the Midwest we've experienced some very cool nights, as well as overall cooler, more fall-like temperatures. With temperatures changes and fall growing conditions, growers are presented with new types of problems than they've been accustomed to with warmer growing conditions. 

Ball Publishing’s Tech On Demand newsletter covered this topic in last Friday’s edition. Ball Seed Technical Services Specialist Nick Flax put together an eight-minute audio file where he covers numerous fall topics, including dehumidification, irrigation management and disease prevention strategies. 
 
 
I invite you to sit back and listen to Nick’s audio discussion where he offers timely and practical suggestions on how to minimize many potential cultural issues during this transitional time of the year. 

The Answer is ...

I showed this image at the top of the newsletter and asked if you could determine the cause of the spotting across the leaf surface. How do you think you did? Before I reveal the answer, it may be helpful if we take a closer look.

All images by Jean Williams-Woodward.
 
The image on the left is from a different hellebore plant than shown above. It shows a more close up view of the blotchy, dark purplish leaf spotting across most of the upper surface of the leaf. When diagnosing foliar issues, I’ve often mentioned the importance of looking at the undersides of the leaves; this is what is shown in the image on the right. Can you see it? There are small dots within the discolored regions. These dots are grayish raised sporulation from a plant pathogen.
 
Since we actually just covered this disease in a recent challenge (think rudbeckia), I’m hoping the penny just dropped. If you answered downy mildew, you are correct. 
 
I really contemplated whether or not to have two downy mildew challenges so close to one another, but then I thought that half of learning is through repetition, and by doing back-to-back downy mildew challenges, I would actually be helping you learn faster and improve your ability to diagnose this if (or when) it occurs on your crops.

e-GRO Alerts

The downy mildew hellebores challenge above was inspired by an e-GRO alert I found while doing some online research. It came directly from the March 2026 edition aptly titled, “Downy mildew on Hellebores.”

This e-GRO alert not only served as inspiration for the diagnostic challenge, but it also contains a great amount of information about downy mildew, its symptoms and disease-management options. At the very least, I recommend you check out the e-GRO Alert – Volume 15 • Number 14 • March 2026 to learn about this disease.

If you like what you see, I encourage you to sign up for your one FREE subscription where you can obtain e-GRO Alerts in your mailbox (e-mail).
 
 
 
e-GRO (Electronic Grower Resources Online) is a collaborate FREE resource and learning tool for anyone involved in greenhouse plant production. The articles, calculators, tools and other content is compiled by some of the leading specialists from universities around the USA. 
 
e-GRO creates alerts and content about many of the industry’s challenges, including diseases, insects, environmental, physiological and nutritional disorders.
 
Visit the e-GRO website to review its content, and if you like what you see, you can subscribe on the website or use this link: FREE e-GRO Subscription.

My email is paul@pace49.com if you have any comments, article suggestions or if you'd just like to say hello.

Best regards,

 

Paul Pilon


Editor-at-Large—Perennial Pulse

National Sales Manager—Pace 49, Inc.


This email was received by you and 33,976 other fine subscribers!

If you're interested in advertising in Perennial Pulse, contact Kim Brown ASAP and she'll hook you up.