Here’s further details about the techniques used to source native seeds and what we do to ensure the greatest chance of success.
Project: Various road infrastructure projects
Client: Multiple civil companies
Period: Winter 2018
Location: Perth CBD
- Sourcing and storage of native seed
- Pre-seeding weed control
- Pre-seeding site preparation
- Seed testing
- Direct seed broadcasting
- Project facilitation and ongoing maintenance
What is direct seeding?
Direct seeding often used in rehabilitation and revegetation works to increase biodiversity and stem density.
Seeds are planted directly where they are to be grown instead of being cultivated in pots and transported on site. It results in a more natural look, healthy plants, and can be more cost effective than other forms of rehabilitation.
We’ve seen great success with our seeding program so far. In 2018 alone the team direct seeded over 200kg of native seed on multiple projects. The seed used included those collected from previous collection seasons and also sourced from accredited seed suppliers.
With regular maintenance, these areas will grow into roadside landscapes that showcase the unique beauty of our native plants.
Best chance for success
Direct seeding does require a large amount of seeds and can show slower results than other methods. It also needs highly specific conditions for success and ongoing maintenance and care.
To ensure best results, the team combined direct seeding with tube stock planting. We also made sure that:
- the correct weed control measures had been taken before seeding, as this is difficult to manage during the first year of germination
- viability and germination tests were completed as required
- seed was pre-treated to each species’ specific requirements in order to break seed dormancy
- seeding was completed at the right time of the year
We stored the seed in our specially designed cool room at the optimal conditions as per RIAWA’s accreditation guidelines. And finally, our team used harrows and rakes to ensure the soil was freshly agitated and in the best condition for ‘seed to soil’ contact.
The Environmental Services team will provide regular maintenance of these areas until they are fully grown.