Aspendale Primary School Tiny Forest 2025

To prepare the site for planting the tiny forest, the existing non-native grass must first be removed. We are using a sheet composting method to smother the grass, which will also allow its remnants—blades and roots alike—to break down and enrich the soil with organic matter. For this, we’ve been collecting large sheets of recycled cardboard from IKEA. This cardboard is ideal due to its thickness and the absence of staples or coatings. Once the cardboard layer is in place, we will cover with a layer of mulch. This combination will create optimal conditions for decomposition, gradually transforming the layers into nutrient-rich soil, which will be enhanced with compost made on site.

The site has been covered with bush mulch. Made from chipped branches and leaf litter, it closely mimics the natural forest floor during the establishment phase, helping to retain soil moisture, regulate temperature, and suppress weed growth—creating ideal conditions for young plants to establish. As it breaks down, bush mulch and the cardboard layer underneath adds organic matter to the soil, improving structure and supporting beneficial microbial activity.

To give the seedlings the best possible start, compost will be added to the soil just before planting. This nutrient-rich amendment supports healthy plant development, helping the seedlings transition and thrive in their new environment. During the first year, compost tea may also be applied to provide additional moisture and nourishment.

We are using a hot composting method to ensure efficiency, producing ready-to-use compost within just a few weeks. This process relies on a precise balance of ingredients to reach and maintain a peak temperature of around 65°C—ideal for fostering the beneficial bacteria that break down organic matter. Careful planning and close attention ensure consistency and quality in every batch.

The compost ingredients include spent coffee grounds, coffee silverskin (a byproduct of the roasting process), garden clippings, dry leaves, cardboard, and food scraps. Each compost bay is checked daily: temperatures are recorded, and the materials are turned regularly to promote airflow and support the microbial activity needed for effective decomposition.