Oh, Grevillea exul! If you’re looking for a garden star that offers spectacular blooms and attracts all sorts of delightful feathered friends, you’ve found it. The vibrant, almost otherworldly red-and-yellow flowers of Grevillea exul, often called the “Flame Grevillea,” are a sight to behold. And the best part? Sharing this beauty is incredibly rewarding. Propagating these stunners can feel a little daunting at first, but I promise, with a little patience and the right approach, you’ll be well on your way to filling your garden, or a friend’s, with these gorgeous natives. For beginners, it’s not the absolute easiest plant to start with, but absolutely achievable with these tips!
The Best Time to Start
My absolute favorite time to take cuttings from Grevillea exul is in late spring to early summer, just as the plant has finished its most vigorous flush of growth. The stems are firm but still have enough life in them to readily root. Think of it as capturing that sweet spot of healthy, energetic growth.
Supplies You’ll Need
Gathering your supplies before you start makes the whole process smoother. Here’s what I recommend having on hand:
- Sharp, clean pruning shears or secateurs: A clean cut is crucial for healthy rooting.
- Rooting hormone: This isn’t strictly essential, but it certainly gives your cuttings a helpful boost. I prefer a powder or gel for ease of use.
- Well-draining potting mix: A mix designed for natives or succulents is ideal. I often use a blend of coarse sand, perlite, and a good quality potting mix.
- Small pots or propagation trays: Clean pots are a must to prevent disease.
- Plastic bags or a propagation dome: This creates a humid environment to keep your cuttings from drying out.
- Labels and a permanent marker: Don’t forget to label your precious cuttings!
- A small trowel or dibber: For making holes in the soil.
Propagation Methods
I find that stem cuttings are generally the most successful and straightforward method for Grevillea exul.
Stem Cuttings
- Select your parent plant: Look for a healthy, vigorous Grevillea exul.
- Take your cuttings: Using your clean secateurs, take cuttings about 10-15 cm (4-6 inches) long from the current season’s growth. Make your cut just below a leaf node (where a leaf attaches to the stem).
- Prepare the cuttings: Gently strip off the lower leaves from the bottom half of the cutting. This prevents them from rotting in the soil and encourages root development. If your cutting has any flowers or buds, it’s best to pinch those off now; we want all that energy going into roots, not blooms.
- Apply rooting hormone: Dip the cut end of the stem into your rooting hormone, tapping off any excess.
- Plant the cuttings: Fill your pots with your well-draining potting mix. Make a hole with your trowel or dibber, then gently insert the cutting. Firm the soil around the base of the cutting.
- Water gently: Water thoroughly but carefully, so you don’t dislodge the cuttings.
- Create humidity: Cover your pots with a plastic bag, securing it with a rubber band, or place them under a propagation dome. Make sure the leaves don’t touch the inside of the bag if possible.
- Place in a bright spot: Find a spot that receives bright, indirect light. Avoid direct sun, which can scorch the young cuttings.
The “Secret Sauce” (Pro Tips)
Here are a couple of little tricks I’ve learned over the years that really seem to make a difference:
- Bottom heat is your friend: If you have a heated propagation mat, placing your pots on it can significantly speed up the rooting process. It mimics the warmth of spring and signals to the plant that it’s time to get growing roots.
- Don’t overwater, but don’t let them dry out: This is a delicate balance! The soil should be consistently moist but never soggy. Check the soil moisture by gently pressing your finger into it. If it feels dry about an inch down, it’s time to water.
- Let the cuttings breathe: Once a week, it’s a good idea to lift the plastic bag or dome for a few minutes to allow for some air circulation. This helps prevent fungal diseases.
Aftercare & Troubleshooting
You’ll know your cuttings are happy when you see new leaf growth appearing. This usually takes anywhere from 4-8 weeks, sometimes longer. Once you see a good amount of new growth, you can start hardening off your new plants. Gradually remove the plastic bag for longer periods each day over a week, and then move them to a slightly more exposed location before planting them out into their own pots or garden beds.
The most common issue you might encounter is rot. If your cuttings start to look mushy, turn black, or simply wilt and refuse to perk up, it’s usually a sign of too much moisture and poor drainage, or fungal infection. If you see this, unfortunately, it’s usually best to discard the affected cuttings to prevent spreading any issues. Ensure your soil is truly free-draining, and always use clean tools and pots.
A Encouraging Closing
Propagating Grevillea exul is a journey, and like any good gardening adventure, it requires a bit of patience. Don’t be discouraged if your first few attempts aren’t perfect. Each cutting is a lesson, and with every trial, you’ll learn more about what your plant needs. Enjoy the process, celebrate the small victories – that first tiny root is a miracle! Happy propagating!
Resource:
https://identify.plantnet.org/k-world-flora/species/Grevillea%20exul%20Lindl./data