THERE IS A SAYING, THE BEST TIME TO PLANT A TREE IS RIGHT NOW – IT MIGHT TAKE A FAIR WHILE TO GET TO THE MATURE SIZE, BUT THE THRILL WILL BE KNOWING YOUR TREE COULD GIVE JOY FOR THOUSANDS OF YEARS TO COME!

The Coastal Redwood (Sequoia sempervirens) is one of the most remarkable trees in the world, known for its immense height, longevity, and historical significance.

Coastal Redwoods are native to the coastal regions of California and Oregon, USA, primarily thriving in a narrow strip along the Pacific coast where the climate is cool, humid, and frequently foggy. They are well adapted to the moist, temperate rainforests of this region, where fog helps to reduce water loss and provides additional moisture.

Growth & Characteristics

• Height: The tallest trees in the world, Coastal Redwoods can grow over 100 metres in their native habitat. The tallest known living tree, Hyperion, reaches 115.92 metres.
• Spread: The crown can spread to 6–12 metres in diameter, but in dense forests, they tend to grow tall with a narrow canopy.
• Lifespan: These trees can live for over 2,000 years, with some specimens dating back to the Roman Empire.
• Growth Rate: Fast-growing, they can add 1–2 metres per year under ideal conditions.
• Trunk & Bark: The bark is thick (up to 30 cm), reddish-brown, and fibrous, providing natural fire resistance.

Historical & Cultural Significance

• Native American tribes used Redwood bark and wood for canoes, houses, and totem poles.
• The logging of Redwoods in the 19th and 20th centuries devastated much of their natural range. Today, conservation efforts protect remaining old-growth forests.
• The Sequoia sempervirens species is closely related to the Giant Sequoia (Sequoiadendron giganteum) and Dawn Redwood (Metasequoia glyptostroboides).

How to Grow Coastal Redwoods from Seed

Growing Sequoia sempervirens from seed is possible but requires patience and the right conditions.

Seed Collection & Preparation

1. Harvesting: Seeds are found in small, woody cones (2–3 cm long). Collect mature cones in autumn and allow them to dry so they release seeds.
2. Cold Stratification: Mimic winter conditions by placing seeds in moist sand or peat moss in the fridge (~4°C) for 4–6 weeks. This helps break dormancy.

Planting & Germination

1. Soil: Use a well-draining, acidic soil mix (peat, sand, and perlite).
2. Sowing: Press seeds lightly into the surface (do not bury deeply, as they need light to germinate).
3. Moisture & Temperature: Keep soil moist but not waterlogged. Maintain a temperature of 15–22°C.
4. Germination: Usually occurs in 1–2 months, but can take longer.

Transplanting & Care

• Light: Prefers full sun to partial shade.
• Watering: Young trees need consistent moisture, especially in dry climates.
• Protection: Provide wind protection and mulch around the base to retain soil moisture.
• Growth Rate: Seedlings grow slowly at first but accelerate as they establish.

Can Coastal Redwoods Grow in Australia?

Yes! While they are not native to Australia, Coastal Redwoods can grown to their full size successfully in cool, temperate regions with high humidity and reliable rainfall, such as parts of Victoria and southern New South Wales. They can be grown to smaller sizes in most states with care. They thrive in deep, fertile soil and can be found in many Australian parks and arboretums.