Geranium solanderi aka Hairy Geranium

Geranium solanderi is an undemanding plant in suitable climates. It requires full sun and tolerates a wide range of soil types — light sandy, medium loamy, or heavy clay — with adaptable pH. It prefers moist soil but is relatively tough once established. Propagation is straightforward from seed or division. It is not commonly grown as a garden plant and no specialist care difficulty rating is documented, but its broad soil and climate tolerance suggests it falls toward the easy end of the scale for outdoor cultivation in its native range.

Geranium solanderi typically reaches 30–60 cm in height as measured in NSW populations, with some plants growing up to 1 m in New Zealand. The plant spreads as a low, ascending to decumbent herb from a swollen taproot. Two varieties exist: var. solanderi is generally smaller (petals 5–8 mm) and var. grande is larger (petals 10–12 mm, branched taproot). Exact mature spread is not documented in primary sources.

Geranium solanderi produces pink to violet/purple flowers in paired clusters (occasionally solitary). Petals are 5–12 mm long, often displaying yellowish veining, with yellow anthers. Fruits are hairy, 12–25 mm long with an elongated rostrum, and contain black seeds. Flowering occurs chiefly August–December in Australia, and September–April in New Zealand, though flowers may be produced throughout the year.

Two botanical varieties of Geranium solanderi are recognised: var. solanderi, which has petals 5–8 mm long and a turnip-like taproot, and var. grande, which has larger petals 10–12 mm long and a branched taproot rather than a single swollen root.

Geranium solanderi is exclusively an outdoor plant, native to Australia and New Zealand. In Australia it is widespread across all states (NSW, QLD, VIC, SA, WA, TAS) in woodland and grassland habitats. In New Zealand it grows from coastal to montane zones (sea level to 600 m), though its range has contracted due to rabbit browsing and weed competition. It prefers full sun and well-drained to moderately moist soils, and tolerates a wide range of soil types.

Geranium solanderi can be propagated by sowing seeds in a cold frame in spring, or by dividing established plants in spring or autumn. Seeds in the wild are dispersed by wind, ballistic projection from the fruit capsule, and possibly by attachment to animals or clothing. The species grows readily from fresh seed in sunny, well-drained conditions.

Geranium solanderi flowers are structured to attract insect pollinators, consistent with other members of the Geraniaceae family. Pollination specifics for this species are not explicitly documented in available primary sources, but the flower structure (showy petals, visible anthers) is typical of insect-pollinated plants.

The roots of Geranium solanderi are edible raw or cooked. They are carrot- or turnip-shaped, starchy, but slightly bitter and not considered highly palatable. PFAF assigns an edibility rating of 1 out of 5. The Noongar people of south-west Western Australia traditionally cooked the older red tuberous roots as a remedy for diarrhoea.

The Noongar people of south-west Western Australia used the cooked tuberous roots of Geranium solanderi to treat diarrhoea. PFAF assigns a medicinal rating of 0 out of 5, suggesting limited documented medicinal use outside of this traditional ethnobotanical record.

PFAF assigns an other uses rating of 0 out of 5 for Geranium solanderi, indicating no widely documented non-food, non-medicinal uses. The primary ethnobotanical record is the Noongar use of cooked roots for diarrhoea treatment.

In New Zealand, rabbit browsing is identified as a key threat contributing to the species' decline. Taller, faster-growing weed species also suppress G. solanderi populations. No specific insect pest or fungal disease information is documented in available primary sources.

Geranium solanderi is native to temperate and warm-temperate regions of Australia and New Zealand, occurring from coastal to montane zones up to 600 m elevation. It tolerates a range of conditions from coastal headlands to inland grasslands. Specific minimum temperature tolerances and USDA hardiness zone data are not documented in available sources.

In New Zealand populations, flowering occurs from September to April, with fruits maturing October to June. In NSW, flowering peaks August to December but can occur throughout the year. Seeds are dispersed by wind, ballistic projection from the fruit capsule, and possibly by attachment. Division in spring or autumn is the recommended propagation/management method.

Hairy Geranium’s native range is Australia, New Zealand.

Hairy Geranium should be watered regularly, allowing the soil to dry out between waterings.

If you're planting Hairy Geranium, you need to make sure you use a potting soil that can retain moisture. While the soil should still be able to drain well, it should contain plenty of organic matter like coco coir or sphagnum moss to help it stay moist and nourish the roots of your plants. This is especially important since Austral Crane's Bill is especially sensitive to dry soil. You can also add other amendments, such as compost, to help retain moisture and provide extra nutrients to your plants. Be sure to keep the soil evenly moist, but not soggy, throughout the growing season. With the right soil and proper care, your Hairy Geranium will thrive!

Hairy Geranium requires abundant, bright and direct light. Placing it less than one foot from a window is the best way to make sure the plant receives enough light to survive and thrive. Depending on your region, however, the current weather can affect the placement of the plant in your home. For example, in some areas the sun may be too direct and intense, so it's best to place it farther away from the window. You may also need to adjust your placement according to the season as the sunlight can change intensity over the course of the year. If you live in a region with significant temperature fluctuations, such as a desert, you may need to place the plant a bit farther away from the window to avoid extreme heat or cold. With some care and attention, your Hairy Geranium will be sure to bring you many years of beauty and enjoyment.

Once the Hairy Geranium has doubled in size or after a year has passed, it should be moved to a new pot. By replacing the soil with fresh potting soil containing all the vital nutrients, your plant will receive all the sustenance it needs, negating the requirement for fertilizer. It's important to remember that plants get their energy from the sun, not fertilizer.

Hairy Geranium is not known to cause harm to humans or pets.