Pittosporum tenuifolium Tom Thumb: A Miniature Marvel
Tawhiwhi
Position
- Full sun to partial shade
- Sheltered position
- Protected from cold winter winds
- Particularly good in coastal gardens
Hardiness
- Hardy down to -5°C to -10°C (23°F to 14°F)
- May need winter protection in colder inland areas
- More hardy in coastal locations
Soil Type
- Well-drained soil essential
- Tolerates most soil types
- Prefers neutral to slightly acid pH
- Can cope with poor soils once established
Soil PH
- Prefers neutral to slightly acid pH
Height
- Height: 1-1.2m
- Spread: 1-1.2m
Seasons of Interest
- Year-round interest from distinctive foliage
- Small purple-black leaves that emerge burgundy
- Tiny purple-black flowers in late spring (rarely seen in UK)
- Compact dome-shaped growth
- Evergreen
Additional Notes
- Excellent for containers and small gardens
- Good for low hedging and borders
- Low maintenance once established
- Drought tolerant when mature
- Can be trimmed to maintain shape
- May need fleece protection in severe winters
- Ideal for contemporary and architectural gardens
- Good alternative to box hedging
- Aromatic foliage when crushed
- Resistant to deer and rabbits
- Benefits from mulching in spring
- Best planted in spring or autumn
- Can suffer in waterlogged conditions
Pittosporum tenuifolium Tom Thumb: The Perfect Compact Shrub for Your Garden
The Pittosporum tenuifolium ‘Tom Thumb’ is a fantastic choice for gardeners seeking a low-maintenance, compact evergreen shrub. Its striking dark purple leaves and occasional honey-scented flowers make it a standout addition to any garden border. This article will explore everything you need to know about growing and caring for this remarkable plant.
What is Pittosporum tenuifolium ‘Tom Thumb’?
Pittosporum tenuifolium ‘Tom Thumb’ is a cultivar of the New Zealand native Pittosporum tenuifolium, also known as tawhiwhi. This compact shrub boasts a distinctive rounded shape, rarely exceeding 1m in height. Its dark purple leaves are leathery and somewhat wavy, providing a beautiful contrast in the garden. While it sometimes produces honey-scented purple flowers in late spring, its foliage is the main attraction.
How to Grow Pittosporum tenuifolium ‘Tom Thumb’
This plant is relatively easy to grow, making it ideal for both beginner and experienced gardeners. It thrives in a sunny position, but can also tolerate partial shade. Well-drained soil is crucial; a mix of soil and compost is ideal. When planting, ensure the soil is moist and apply a generous layer of mulch around the base of the plant to retain moisture and suppress weeds.
What are the Best Conditions for Growing Tom Thumb?
Pittosporum tenuifolium ‘Tom Thumb’ prefers full sun or at least partial sun for optimal growth. It handles a range of temperatures, tolerating conditions from mild winters to warmer summers. However, in colder areas (below -5°C/23°F), consider protecting it from harsh winter winds and provide some cold protection. Well-drained soil is key. Avoid waterlogging, as this can harm the roots.
How Big Does a Tom Thumb Shrub Grow?
The Tom Thumb shrub’s compact habit keeps it naturally small, typically reaching a mature height and spread of around 1m (3ft). Its slow growth rate makes it perfect for smaller gardens or containers. Its rounded shape needs minimal pruning to maintain its attractive form.
When and How to Prune Pittosporum tenuifolium Tom Thumb
This low-maintenance shrub requires minimal pruning. Dead or damaged stems can be removed throughout the year. If you need to shape or reduce the size, prune lightly after flowering in late spring. Avoid heavy pruning, as it can damage the plant’s attractive form.
What Type of Soil Does Pittosporum Tenuifolium Tom Thumb Need?
A well-drained soil is vital for the health of your Tom Thumb. Amend heavy clay soils with compost or other organic matter to improve drainage. A well-drained mixed border is also ideal. The addition of gravel to improve drainage is beneficial in areas with poor drainage.
How to Buy and Plant Pittosporum tenuifolium ‘Tom Thumb’
You can usually buy Pittosporum tenuifolium ‘Tom Thumb’ as a container plant from nurseries or garden centres or online at Amazon. Look for healthy plants with vibrant foliage and no signs of disease. Choose a size appropriate for your space – they’re readily available in various sizes, from small litre pots to larger ones. Planting is straightforward; simply dig a hole twice the size of the root ball and plant at the same depth as it was in its container.
Does Pittosporum tenuifolium Tom Thumb Need Much Maintenance?
The Tom Thumb is prized for its low-maintenance nature. Regular watering during dry periods, especially during the first year after planting, is important. Applying mulch around the base will help retain moisture and suppress weeds. This reduces the need for frequent watering and weeding, making it a perfect choice for busy gardeners.
What are the Benefits of Growing Pittosporum tenuifolium Tom Thumb?
This compact evergreen shrub offers several benefits. Its dark purple leaves provide year-round colour, while its occasional honey-scented flowers add a delightful fragrance to your garden. Its low maintenance and compact habit make it ideal for smaller spaces or as part of a mixed border. The distinctive rounded shape creates a visually appealing focal point. The Tom Thumb also holds the prestigious RHS Award of Garden Merit, indicating its quality and reliability.
Key Points to Remember:
- Awarded the RHS Award of Garden Merit
- It’s a compact, low-maintenance evergreen shrub
- It thrives in full sun or partial shade and well-drained soil
- It requires minimal pruning
- It boasts attractive dark purple leaves and sometimes honey-scented purple flowers
- It’s an ideal choice for borders, containers, and small gardens
Check out the RHS article here.
For more information on Shrubs for your garden please click here.
Frequently Asked Questions
Q: What is Pittosporum tenuifolium ‘Tom Thumb’?
A: It’s a small, attractive shrub, also known as tawhiwhi, with pretty leaves, a popular choice for gardens. This hardy plant is ideal for low hedges or adding charm to gravel gardens.
Q: How do I care for my tawhiwhi in winter?
A: In winter, protect your tawhiwhi from cold winds. It’s quite hardy, but extra protection is beneficial. Ensure it’s in well-drained soil to prevent waterlogging.
Q: Does Pittosporum tenuifolium ‘Tom Thumb’ produce any flowers?
A: Yes! This plant reliably produces pretty, dark purple, honey-scented flowers, typically blooming in warmer months.
Q: Where can I buy tawhiwhi?
A: You can buy tawhiwhi at most garden centres or online plant retailers like Amazon. Look for healthy plants with dark grey or black young stems.
Q: What kind of soil does Pittosporum tenuifolium ‘Tom Thumb’ prefer?
A: This plant prefers well-drained soil. It tolerates some drying winds, but excess moisture is detrimental. Choose a location with good drainage.
Q: How big does ‘Tom Thumb’ get?
A: Pittosporum tenuifolium ‘Tom Thumb’ usually grows to about 2-3 inches a year, making it suitable for small gardens or larger hedges. It maintains a compact form.
Q: Can I use tawhiwhi for a privacy hedge?
A: Yes! This variety is suitable for low hedges. While not very tall, its dense foliage offers privacy and charm.
Q: When is the best time to plant Pittosporum tenuifolium ‘Tom Thumb’?
A: Spring or autumn are ideal planting times for tawhiwhi. By summer you should have a well-established, weather-resistant plant.