Hello fellow green thumbs! I’m so excited to share a little secret of mine today – how to make more of the breathtaking Banksia ashbyi. If you’ve ever seen these beauties with their fiery, brush-like blooms, you know they bring a serious wow factor to any garden, especially here in our Australian landscapes. Growing them from seed can be a bit of a journey, so propagating from cuttings offers a fantastic way to get rewarding results, and honestly, it’s where I find so much joy. While not the absolute easiest plant for a complete beginner, with a little patience and these tips, you’ll be well on your way to success.
The Best Time to Start
The sweet spot for taking cuttings of Banksia ashbyi is typically in late spring to early summer. This is when the plant is actively growing and has plenty of semi-hardwood material available. Look for stems that are firm but still have some flexibility – not too soft and floppy, and definitely not woody and stiff. Think of it as the plant’s “teenager” stage; it’s got the energy to put down roots!
Supplies You’ll Need
Getting your workspace ready with the right tools is half the battle. Here’s what I always have on hand:
- Sharp, clean pruning shears or secateurs: A clean cut is essential for preventing disease.
- Rooting hormone: I prefer a powder that contains IBA (Indole-3-butyric acid). It really gives cuttings a boost.
- A well-draining potting mix: My go-to is a blend of coarse sand, perlite, and a bit of coir or fine bark. Good drainage is non-negotiable for Banksias.
- Small pots or seedling trays: Make sure they have drainage holes.
- A plastic bag or propagator lid: To create a humid environment.
- Labels and a marker pen: You’ll thank me later for knowing what you planted and when!
- Optional, but super helpful: A heat mat or warm spot: Bottom heat can significantly speed up root development.
Propagation Methods: Stem Cuttings
This is my favorite and most reliable method for Banksia ashbyi.
- Select your parent plant: Choose a healthy, vigorous Banksia ashbyi.
- Take your cuttings: In the morning, after any dew has dried, use your sharp secateurs to take 10-15 cm (4-6 inch) cuttings from the tips of current season’s growth. Aim for those semi-hardwood stems I mentioned.
- Prepare the cuttings: Remove the lower leaves from the cutting, leaving about 2-3 sets of leaves at the top. If the leaves are large, you can even cut them in half to reduce water loss.
- Apply rooting hormone: Dip the cut end of each cutting into your rooting hormone powder, ensuring it’s well coated. Tap off any excess.
- Pot up your cuttings: Gently insert the prepared cuttings into your well-draining potting mix. Make a small hole with a pencil or finger first to avoid rubbing off the rooting hormone. Firm the soil around the base of each cutting.
- Create humidity: Cover the pots with a clear plastic bag (propped up with stakes so it doesn’t touch the leaves) or a propagator lid. This is crucial for keeping the moisture levels high.
- Place in a bright, warm, but indirect light spot: Avoid direct sun, which can scorch young cuttings.
The “Secret Sauce”
Here are a couple of things I’ve learned over the years that make a big difference:
- Don’t rush into watering: After potting up, lightly water your cuttings from the bottom if possible. You want the soil to be moist, not soggy. Overwatering is a quick route to rot.
- Bottom heat is a game-changer: If you can, place your pots on a heat mat set to around 20-24°C (70-75°F). This warmth encourages root formation from below, while the top stays cooler. It truly speeds things up and increases success rates.
- Cleanliness is key: Always use sterilized tools and pots. Banksias can be susceptible to fungal diseases, so a clean start makes all the difference.
Aftercare & Troubleshooting
Once your cuttings have rooted – this can take anywhere from 6-12 weeks, so patience is a virtue! – you’ll start to see new growth.
- Gradual acclimatization: Slowly remove the plastic cover over a week or two, allowing the cuttings to adjust to the ambient humidity.
- Gentle watering: Continue to water when the top inch of soil feels dry. Avoid letting them dry out completely, but also avoid waterlogging.
- Move to slightly larger pots: Once they have a decent root system and some new leaves, you can transplant them into slightly larger pots.
- Watch out for rot: The most common sign of failure is rotting at the base, often appearing as mushy, black stems. This is usually due to too much moisture and poor drainage, or sometimes fungal issues. If you see this, it’s unfortunately usually a sign the cutting is lost.
A Little Bloom of Encouragement
Propagating Banksia ashbyi is such a rewarding process. It’s a chance to connect with your plants and witness that magic of new life. Don’t be discouraged if you don’t succeed with every cutting; gardening is all about learning and adapting. Be patient, enjoy the process of nurturing these little potential beauties, and soon you’ll have more of these spectacular blooms to brighten your world. Happy propagating!
Resource:
https://identify.plantnet.org/k-world-flora/species/Banksia%20ashbyi%20Baker%20f./data