Hibiscus syriacus 'Oiseau Bleu', commonly known as Rose of Sharon, is a stunning deciduous shrub celebrated for its large, lavender-blue flowers with a deep crimson eye at the centre. Blooming prolifically from late summer into autumn, it fills the garden with exotic-looking colour at a time when many other shrubs have long finished flowering. Upright and tidy in habit, 'Oiseau Bleu' — meaning "Blue Bird" in French — is a refined choice for borders, courtyard gardens and feature planting, combining easy care with a truly eye-catching display.

Habit and appearance

Growth form: 'Oiseau Bleu' forms an upright, vase-shaped deciduous shrub with an elegant, slightly columnar habit. The mid-green foliage is deeply lobed and provides an attractive backdrop throughout the growing season before the plant comes into its spectacular late-season flowering display.

Flowers: The blooms are large, single, trumpet-shaped and a distinctive soft lavender-blue — an unusually cool tone for a hibiscus — each adorned with a bold, deep red-purple central eye. Flowers are produced in great abundance over an extended period from mid summer through to autumn, making this one of the longest-flowering shrubs available for temperate gardens.

Growing conditions

Aspect and position: Plant in a full sun position for the best flowering performance. 'Oiseau Bleu' thrives in warm, sheltered spots and is an excellent choice for south- or west-facing borders. It will tolerate partial shade, though flowering may be reduced. In cooler climates, a warm wall or sheltered courtyard position will encourage the most prolific blooms.

Soil: Prefers a fertile, moist but well-drained soil. It will adapt to most reasonable garden soils, including moderately sandy or clay-based conditions, provided drainage is adequate. Avoid permanently waterlogged ground. Incorporate organic matter at planting time to improve soil structure and moisture retention.

Hardiness: Rose of Sharon is fully hardy in most temperate climates and tolerates cold winters well once established. Young plants may benefit from a light mulch over the root zone during their first winter.

Care

Watering: Water regularly during the first growing season to help the plant establish a strong root system. Once established, Hibiscus syriacus is reasonably drought tolerant, though consistent moisture during dry spells during summer will support the best flowering performance.

Feeding: Apply a balanced slow-release fertiliser in spring as new growth begins. A feed with a potassium-rich fertiliser in early summer can help promote abundant flowering. Avoid excessive nitrogen, which encourages leafy growth at the expense of blooms.

Pruning: Pruning is straightforward and helps maintain a tidy shape and encourages vigorous flowering. In early to mid spring, once the risk of frost has passed and new buds begin to swell, cut back the previous year's stems by roughly one-third to one-half. Harder pruning will result in fewer but larger flowers; lighter pruning will produce a greater number of blooms. Remove any dead, damaged or crossing branches entirely. Avoid pruning in autumn or winter as this can expose the plant to frost damage.

General maintenance: 'Oiseau Bleu' is a low-maintenance shrub with good resistance to most common pests and diseases. Deadheading spent flowers is not necessary but can keep the plant looking neat. A layer of mulch applied around the base in spring will help retain moisture and suppress weeds.

Guide to Planting Field-Grown Root Balled Plants

Pros:

1. Established Roots: Typically stronger, established roots ensure better initial growth.
2. Immediate Impact: Larger plants provide instant structure and aesthetics.

Cons:

1. Heavy and Bulky: Can be difficult to transport and plant due to size and weight.
2. Seasonal Availability: Generally available only in the dormant season (autumn to early spring).

Preparation for Planting:

1. Unwrap Carefully: Remove any packaging material, but leave the burlap or wire basket on.
2. Keep plants moist: Plants should be kept moist until the time of planting.

Planting Process:

1. Dig a Hole: Make a hole twice the width of the root ball and the same depth.
2. Position Plant: Place the root ball in the hole, ensuring the top is level with the ground surface.
3. Do Not Remove Root Sack: Leave the burlap or wire basket around the root ball. It is bio degradable and will rot away naturally.
4. Backfill: Fill the hole with soil, firming gently around the roots to eliminate air pockets.
5. Water: Water deeply after planting to settle the soil and avoid wilting.

Possibility of Losses:

• Initial Shock: Some plants may suffer transplant shock, leading to potential losses.
• Mitigation: Proper care and consistent watering during the establishment phase can minimise this risk.

Main Causes of Failure:

1. Improper Planting Depth: Planting too deep or too shallow can stress the roots.
2. Poor Soil Conditions: Compacted or poorly drained soil can hinder root growth.
3. Insufficient Watering: Both under-watering and over-watering can lead to plant stress and failure. Strong wind can dry leafy pants.
4. Pest and Disease: Lack of protection and monitoring can result in damage from pests and diseases.

Tips for Success:

1. Stake Larger Plants: Support with stakes to prevent wind damage.
2. Mulch: Apply a layer of mulch around the base to retain moisture and regulate temperature.
3. Regular Monitoring: Check for signs of stress, pests, and disease, and address them promptly.

By following these guidelines and providing consistent aftercare, you can successfully plant and establish field-grown root balled plants in your garden.

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Does the height include the pot?

No, we measure from the top of the pot to the tip of the plant except for some of the instant planted screens, in this case it will be stated in the description

How long does delivery take?

Most orders are delivered in just a few days, Smaller items are often sent with Parcelforce on a next day service, Larger items should allow up to 10 days due to the size of the items they often have to be sent on our own transport.

Where will you leave my plants?

We will leave your order at the front of your property, Parcelforce may
leave your items in a safe place if you let us know, Pallet couriers
will require a flat hard surface to deliver to, no gravel or soil, a
driveway or parking spot would be best. Most importantly Deliveries by
pallet courier will require access for a large truck (bin lorry sized)
to get near the delivery point. Deliveries sent on our own transport may come in a small van or larger truck.