Dahlia Experiments 2025 - Growing Dahlia Seedlings
Hello friends,
As part of my dahlia growing experiments this year, one of my goals is to grow my own dahlia plants from seed. I have a stash of dahlia seed available, including the Bee's Choice dahlia variety from Floret in the USA (which I bought from Emerden last year), Beeline I and II dahlia seeds from the breeder Doctor Keith Hammett in New Zealand, dahlia seeds from Susie Ripley's garden in Dunedin, and also open pollinated seeds from my own garden.
At the end of August, once I was able to garden again after my second cataract surgery, I sowed my dahlia seeds into two covered seed trays, and sprinkled them with enough seed raising mix to cover them.
With them watered, and kept moist in the trays, the dahlia seeds stayed in our dining room in the warmth while they germinated. To my surprise, most of the dahlia seeds I planted germinated, at a rate of about 95%, which is way more dahlias than I expected to plant in my garden this year.
They grew nice and strong, and soon they were ready to transplant out into bigger pots with potting mix. They've been growing safe and sound in my glasshouse since then, growing bigger each week. My plan is to plant them in the garden after the last frost, but for now I have to figure out where I'm going to put 43 dahlia seedlings...
I can't wait to see what dahlia flowers appear from these seedlings over the summer. My plan is to be quite harsh with them, and I'll pull out any flowering plant that I'm not happy with, to give other dahlias room to grow. I'll give you updates as I go...
Have a wonderful day
Julie-Ann
Want to discuss my post? Feel free to chat with me on Instagram or Mastodon or Bluesky.
How To Keep My Outdoor Dahlias Alive During Spring Frosts
Hello friends,
We're at the time of the year when the days are getting longer and warmer, and my dahlias in the ground are starting to wake up and poke their heads above ground. This is a good thing, but it is also very stressful because spring weather in Dunedin can be quite fickle.
It used to be that you could plant temperature sensitive crops of all types in Dunedin at Labour weekend, which is in the third weekend of October. But for the last three years we either have had a snowfall in the last week of October, or we have a very late frost in the first week of November. As this is a death sentence for any dahlia growing in the garden, I've had to come up with a frost protection method which will work for all my dahlia plants.
Over the last couple of years I've tried frost clothing my dahlias, but this method is prone to the wind blowing the frost cloth off overnight before the frost at dawn. So I've had to resort to a more brute force method of protecting my dahlias. After many trials, I finally settled on using a lot of small, cheap buckets, placing them on top of the dahlias on risky nights, and holding them in place with a spare piece of firewood.
It's not a very pretty method, but it does the trick. It does take a lot of work though, going around each night putting buckets on dahlias, and then the next morning removing them when the temperature rises. Larger buckets are needed to protect the dahlias as they get bigger. Then there is the problem of running out of buckets if too many dahlias are above ground, and I'm not proud to admit this, but that's when I resort to raiding the kitchen cupboards for ice cream containers and mixing bowls...
I used to go around with a wheel barrow collecting up all the buckets and firewood each day, and then redepositing them each night, but now I've gotten lazy, and leave them sitting beside each dahlia all the time for easier distribution. It may make the garden ugly looking for about a month, but I can totally live with that.
The whole process is a giant pain in the ass, but it's completely worth it in summer when my garden is filled with flowering dahlias.
Have a wonderful day
Julie-Ann
Want to discuss my post? Feel free to chat with me on Instagram or Mastodon or Bluesky.
Dahlia Experiments 2025 - Source Books For Dahlia Growing and Hybridising
Hello friends,
As you've probably already figured it out by now, I love doing gardening experiments. Whether it be growing my own wheat, and then harvesting that flour to bake into my own bread, or growing my own linen plants so I can spin and then weave the fibre from it, I'm curious about how the world works, and especially how plants work. This mostly comes from the fact that I'm a trained scientist, I have a PhD in Plant Biochemistry, and also a certificate in Horticulture. From a very young age, while gardening with my grandfather and aunt in their backyard, I fell in love with plants, and I decided I wanted to work with them.
Even though I am no longer in these fields of work, I still love learning about plants, and I use my garden as an experimental testing ground to do this on a very small scale. This, combined with my obsession and love of dahlias, I've decided that this growing season is going to be the one where I hone my dahlia skills including growing hybridised seeds from scratch, taking my own cuttings, and also breeding new dahlias from dahlias I already have growing in my garden.
To do this my first job has been to find good source material to work from. Even though there is a tonne of information about dahlia growing and hybridising on the internet, it's hard to know what information is accurate, and what information is incorrect. Luckily there are some very good source books available from growers and hybridisers I trust, and I now have three books from them at my disposal.
First up is Erin Benzakein from Floret Flower Farm, her work with dahlias and other plants like zinnias is legendary, and her book "Discovering Dahlias" has been my go to dahlia book for years. It includes understanding dahlia types, how to grow, store, and divide dahlias, and also advanced techniques including propagating and hybridising dahlias. Her book also includes a great section on floral designing with dahlias, along with a visual section of her favorite dahlias sorted by colour. I really recommend this book to any new dahlia grower.
The last two dahlia source books I now own are by Kristine Albrecht, the owner of Santa Cruiz Dahlias. Her long term work on dahlia breeding, and her deep dive into dahlia genetics (which she is willing to share), makes her a fountain of knowledge about dahlias. Her book "Dahlias: Seed to Bloom" is an in depth guide to dahlia growing from seed to bloom. This is a great companion book to "Discovering Dahlias", and I now use them both side by side.
Kristine Albrecht's second book "Dahlia Breeding for the Farmer-Florist and the Home Gardener", is a small, but dense step by step guide to hybridising new dahlia varieties by seed. Its sections on dahlia genetics, traits to target in dahlia breeding, and growing dahlia seedlings, is perfect for the dahlia enthusiast interested in dahlia breeding. It was also really great to see her record keeping set up as well, as detailed notes are needed to decide whether a dahlia seedling has the traits you are looking for in the first year, and in the continuing years, if you decide to keep growing it.
With spring now sprinting towards summer with each passing day, and the first of my garden dahlias are popping their leaves above ground, I can't wait to dive into all things dahlias this growing season.
Have a wonderful day
Julie-Ann
Want to discuss my post? Feel free to chat with me on Instagram or Mastodon or Bluesky.
I've Gone Completely Dahlia Crazy
Hello friends,
If you were to ask me about my top 5 favorite flowers of all time, the list would be something like this: Roses, Lavender, Dahlias, Daffodils, and Cosmos.
But over the last couple of years dahlias have crept up to the top that list, as each of the gardening projects around our home ended up giving me more and more space to grow dahlias. It also didn't help that I started following a bunch of dahlia growers on social media, and also especially, Floret Flower Farm in the USA, on both Instagram and YouTube. I became especially fond of anemone dahlias, collarette dahlias, and single dahlia varieties, of course in a large number of colours and sizes.
It got to a point that I had developed a wish list of some very cool, but rare dahlias I just had to have...and come dahlia bulb pre-sale time this winter I went a little nuts buying them.
The next problem was figuring out where to put them, so out came my trusty Instax photo printer, and I got to work printing out photos of all the dahlia varieties I had, and also the ones on their way to me, and then I got to work organizing them. First up was developing a dahlia database based on type and colour and size.
The colour coding in the database give me a quick idea of where my dahlias are in terms of where they are in the world. Sage green are dahlias already in place. Bright green are dahlias which have to be moved. Apricot means that the dahlia is in storage in the garage. Peach means that the dahlia has not arrived yet.
Next up was to break down our garden into sections, and then arrange the dahlia photos in each area of the garden to get an overall plan. I'm going to use the following abbreviations for the different dahlia types: Anemone (A), Collarette (C), Decorative (D), Dinner Plate (DP), and Single (S), Waterlily (W).
Front Garden Right: Peaches and Cream (D), Penhill Dark Monarch (DP), Totally Tangerine (A). I grouped these based on similar colouring.
Front Garden Middle: Iced Tea (D), Keith Hammett Dream Seeker (C), Joal Kaitlyn (D), and Sweet Nathalie (D). These all have similarish apricot colouring.
Front Driveway Road: Yelno Harmony (W), Cafe Au Lait (DP). These have light apricot colouring.
Front Driveway Middle: Lucky Number (D), Aporo Road Strawberry (D), Molly Raven (D), Cafe Au Lait Twist (DP). All these have dark pink shades, and should look amazing together.
Patio: Zahra (A), Floorinoor (A), Misses Amy (A). Three anemone dahlias I bought very recently, so they go into pots this year because I have no more space in the garden.
Back Driveway: Silver Years (D), Strawberry and Cream (D), Dutch Pearl (D), Muchacha (D). A gradient from light pink to dark pink.
Back Garden Back Fence: Rosemary Webb (W), Islander (DP), Bonesta (D), Bumble Rumble (C), Cafe Au Lait Royal (DP), Sweet Sanne (D), Cafe Au Lait Rose (DP), Arthur Hammerly (DP), Mambo (A), Misses Miley (D), Impression Famoso (C), Fenna Baij (A), Julie-Ann (S, a dahlia I hybridised last year), Keith Hammett Mystic Sparkler (S). A gradient of colour from left to right along the back fence. It's a bit more loose in terms of shading toward the right side, with dahlias I didn't know where to put elsewhere.
Back Garden Far Right Corner: Keith Hammett Butterscotch (C), The Phantom (A), Dark Tiger (C). Collarette and anemone dahlias that are small and fit under the small tree in that space.
Back Garden Right Fence Back: Keith Hammett Protegee (S), Keith Hammett Delicacy (C), Pink Magic (D), Keith Hammett Tranquility (C), Lady Liberty (D), and Polka (A). Shades of pink and white.
Back Garden Right Fence Front: Great Silence (D), Fancy Pants (C), Salmon River (D), and Fairway Pilot (DP). More peachy tones.
As you can see I now have 48 dahlias in my garden (which don't include the seedling dahlias I'm growing in pots right now). In this second spreadsheet I've organised the dahlias based on where they are in the garden, and which direction they are in. It's a good idea for when labels come off the dahlias, and I can't figure out which ones they are after they die back in winter...
With this large amount of dahlias in my garden, I now have no space for any more dahlias (or any other plants really), even though I do have some more dahlias on my wish list like Rhubarb and Cream, Appleblossom, Thomas Edison, Marshmallow Baby, Negroni Sunset, Klara Zak, Dutch Delight, Breakout, Purple Flame, and Labyrinth.
Either I need to dig up what little grass space we have left, or I would need to get rid of our long, side hedge, and then build a new fence between us and the neighbours, and then make another garden...
For now I'll just have to pit the dahlias up against each other Hunger Games style, and see which plants survive each year.
Have a wonderful day
Julie-Ann
PS - After this post was written I got word from NZ Bulbs that one of the dahlias that hadn't arrived yet, Dark Tiger, was unavailable, so I had to choose another dahlia to replace it with. I chose the waterlily dahlia "Twiggy", but then had to rearrange a couple of dahlias in that area of the garden to fit this change, as Twiggy grows much bigger in size than the space I had chosen Dark Tiger for...
Want to discuss my post? Feel free to chat with me on Instagram or Mastodon or Bluesky.
Social Media
Archives