Here’s a short guide on the general technique that Arkham’s Botanical uses to germinate Acacia seed.
The main thing to bear in mind if you want to germinate Acacia species is that their seed is coated in a hard protective layer which needs to be scarified in order to improve germination rates. If you want to know more, read on for the basics!
- Acacia seed
- Clear plastic bag
- Composted pine bark, peat moss or vermiculite
- Flexible wire
- Plant labels
- Plastic plant pots or similar containers
- River sand
- Rubber band
- If re-using equipment and soil, sterilise it as best you can to prevent possible contamination from pathogens or weeds.
- Mix three parts river sand, one-part well-composted pine bark, peat moss or vermiculite and six parts soil. You can also add a minimal amount of slow-release plant pellets too if you wish.
- Take the clean plant pots and fill them with the potting mix.
- To allow moisture to penetrate their hard coats, Acacia seeds require scarification prior to sowing. Thin the coat by rubbing the seeds with sandpaper.
- Sow approximately five millimetres apart and lightly cover with soil mix to a little more than the seed’s length.
- Lightly press the soil flat and water. Remember to label the pots with the species, date and number of seeds sown!
- Cover the containers with a plastic bag supported by the wire and secured by a rubber band.
- Put the containers in a semi-shaded place and keep the soil moist but not wet. Germination should occur between a few days and a few weeks from sowing.
- When the seedlings are around two to three centimetres high they should be transplanted into seven-centimetre pots to allow room for growth.