Last edited on 3 Feb 2024. View history
Quandong
How to sow quandong: Direct seed
Sun requirement for quandong: Plant in Full Sun
Quandong, or Desert Quandong, is tall evergreen shrub or small tree in the Sandalwood (Santalaceae) family. It is native to the central deserts and southern parts of Australia. The trunk has dark gray bark and leathery ovate leaves. Flowers are 2-3 mm in diameter, fragrant, white or green on the outside, and red or brown on the inside. Plants produce round red or yellow fruit after they are 4 years old. Fruit are 2-3 cm across and look like a brain once their hard, waxy shell is removed. They have a tart flavor similar to peach, apricot, or rhubarb. Quandong are high in Vitamin C and are a popular bushfood. They are also used as exotic flavoring. The plants are hemi-parasitic: they can photosynthesize, but acquire nutrients beyond sugars from the root systems of other plants like grasses and trees without harming the host plants. Propagation can be tricky. Direct seed in a pot after soaking and partially cracking three-year old seeds with a vice or nutcracker (older seeds have a higher germination rate). Germination can take 1-4 months at ideal temperatures of 15° C. Transplant seedlings outside within 10 m of a host plant such as a local, indigenous grass or flowering pea plant.
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Quandong facts
Lifespan
Height × spread
600cm × 400cmCrop cycle
Max altitude
Optimal light
What are growing degree days?
A plant grows with warmth, not with days. A growing degree day is one day's worth of useful warmth: how many degrees the day's average temperature is above the lowest temperature the crop grows at. Add them up from planting and you know how far along the crop is, whatever the calendar says.
Say that lowest temperature is 10°C. A day averaging 17°C gives 7 growing degree days. A day averaging 8°C gives none, as it is too cold for the crop to grow. That is why the same lettuce takes about 50 days in a summer and 90 in an autumn: it needs the same total warmth either way.
For quandong, the FAO EcoCrop database gives a lowest growing temperature of 5°C and a shortest growing cycle of 60 days at its best temperature, about 990 growing degree days to a first harvest.
Where you've told us where your garden is, we use this and the weather there to predict when your quandong will be ready to harvest. We don't use it for how long a plant lives or when it finishes: we go by what members have logged for that.
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Ecological requirements
Data from the FAO EcoCrop database for Santalum acuminatum
| Family / Taxonomy | Magnoliopsida Rosidae Santalales Santalaceae |
|---|---|
| Killing temperature | growth: 0 °C, rest: -2 °C |
| Life form | shrub, tree |
| Life span | perennial |
| Habit | erect |
| Optimal soil depth | deep (>>150 cm) |
| Optimal soil texture | medium |
| Optimal soil fertility | low |
| Optimal soil drainage | well (dry spells) |
| Optimal soil salinity | low (<4 dS/m) |
| Photoperiod | short day (<12 hours) |
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