Oh, the King Billy Pine! Isn’t it just a dream of a tree? Lagarostrobos franklinii, as it’s known to the botanists, is a magnificent conifer with delicate, feathery foliage that shimmers with a silvery-green hue. It was once thought to be extinct, a true survivor from prehistoric times, and growing one from scratch feels like being a part of history. If you’re looking for a project that’s both beautiful and a little bit adventurous, propagating this Tasmanian beauty might be just the thing. Now, let’s be honest, it’s not going to be the easiest plant for a complete beginner to get going, but with a little care and patience, I’ve seen even hesitant gardeners have success. Think of it as a rewarding challenge!
The Best Time to Start
For the most success with your Lagarostrobos franklinii, I always recommend working with it when it’s actively but not aggressively growing. Late spring to early summer is usually my sweet spot. The stems have developed some bit of woody strength, but they’re still supple enough to root. This gives them plenty of time to establish before the cooler weather sets in.
Supplies You’ll Need
Here’s what I gather before I get my hands dirty:
- Sharp, clean pruning shears or a craft knife: For making clean cuts.
- A rooting hormone powder: This really gives your cuttings a boost. Look for one formulated for woody cuttings.
- A well-draining potting mix: I usually use a blend of perlite, peat moss, and a bit of coarse sand. A mix designed for succulents or cacti works well too.
- Small pots or seed trays: Clean ones are essential to prevent disease.
- A plastic bag or propagation dome: To create a humid environment.
- A spray bottle: For misting.
- Optional: Bottom heat mat: This can significantly speed up rooting.
Propagation Methods: Stem Cuttings
This is the go-to method for Lagarostrobos franklinii. We’re looking for semi-hardwood cuttings.
- Take the Cuttings: Gently select a healthy branch from your parent plant. Using your clean shears, take cuttings about 4-6 inches long. Look for stems that have started to feel slightly firm, not brand new and floppy, but not completely woody and stiff either. Remove any lower foliage, leaving just a few leaves at the top.
- Prepare the Cuttings: If your cuttings are very long, you can cut them in half to make them more manageable within your propagation setup. This also gives you more plants to work with!
- Apply Rooting Hormone: Dip the cut end of each cutting into the rooting hormone, tapping off any excess. This is like giving them a little energy drink for rooting.
- Plant the Cuttings: Fill your small pots or trays with your prepared potting mix. Gently poke a hole in the center of the mix with a pencil or your finger. Carefully insert the cut end of your Lagarostrobos franklinii cutting into the hole, ensuring it’s deep enough to be stable (about an inch or so). Firm the soil gently around the base.
- Create Humidity: Water the soil lightly. Then, cover the pots with a plastic bag or a propagation dome. This traps moisture and creates the humid microclimate they love. Make sure the leaves aren’t pressing against the plastic. If they are, you can prop up the bag with a few small sticks.
The “Secret Sauce” (Pro Tips)
Over the years, I’ve learned a few tricks that often make the difference between success and disappointment with finicky plants like this.
- Don’t Let the Foliage Touch the Water: When you water your cuttings, be sure to water the soil. If any of the delicate foliage gets waterlogged and stays damp, it’s a fast track to rot.
- Bottom Heat is a Game-Changer: If you can swing it, an inexpensive seedling heat mat placed under your pots works wonders. It encourages root development from below, speeding things up considerably. It really gives those tiny root hormones something to get excited about!
- Air Circulation Matters: Even though we’re creating humidity, it’s crucial to give the cuttings a little fresh air once a day. Open the bag or dome for a few minutes to prevent fungal issues. It’s a balancing act!
Aftercare & Troubleshooting
Once you start to see tiny roots peeking out of the drainage holes – and this can take anywhere from a few weeks to a couple of months – it’s time to pay extra special attention.
Carefully transfer your rooted cuttings into slightly larger pots with fresh, but still well-draining, soil. Keep them in a bright, but indirect light location. Continue to mist them occasionally and ensure the soil stays consistently moist but never soggy.
Now, what if things go wrong? The most common culprit is rot. If your cutting turns mushy, black, or starts to fall apart, it’s likely succumbed to rot. This is often caused by too much moisture, poor drainage, or inadequate air circulation. Don’t despair! Sometimes, you can salvage a cutting if you catch rot early by cutting away the affected parts and repotting into fresh, drier medium. But for Lagarostrobos franklinii, it often means starting again.
A Encouraging Closing
Growing Lagarostrobos franklinii from cuttings is a journey. There will be moments of triumph when you see those first root hairs, and perhaps moments of frustration if a cutting doesn’t take. The most important thing is to embrace the process, learn from each one, and enjoy the connection you’ll feel to this ancient and beautiful tree. Be patient, keep it humid, and happy propagating!
Resource: