Alstroemeria 'Summer Sky'® – Planting & Care Guide

About Alstroemeria 'Summer Sky'®

Alstroemeria 'Summer Sky'®, also known as the Peruvian Lily or Lily of the Incas, is a compact, long-flowering perennial that produces an abundance of elegant white flowers with delicate yellow throats and fine burgundy markings. Flowering continuously from early summer until the first frosts, it brings months of colour to borders, patio containers and cut flower gardens.

Growing to approximately 50–70cm tall with a spread of 40–60cm, this hardy variety forms neat clumps of lush green foliage and produces sturdy stems that are perfect for cutting. The flowers are highly valued in floral arrangements, often lasting up to two weeks in a vase. Loved by bees and other pollinators, 'Summer Sky'® is an excellent choice for wildlife-friendly gardens.

Planting Guide

• Plant in full sun or partial shade.
• Choose a sheltered position protected from strong winds.
• Prefers fertile, humus-rich, well-drained soil.
• Improve the soil before planting by adding compost or well-rotted organic matter.
• Dig a hole twice the width of the root ball and the same depth.
• Carefully remove the plant from its pot, taking care not to disturb the roots too much.
• Position the plant so the crown sits level with the soil surface.
• Backfill with soil, firm gently and water thoroughly.
• Apply a layer of mulch around the base to help retain moisture and suppress weeds.
• Space plants approximately 40–50cm apart.

Care & Maintenance

Alstroemeria 'Summer Sky'® is a rewarding perennial that provides months of colour with minimal care.

• Water regularly during the first growing season.
• Keep the soil evenly moist but avoid waterlogging.
• Once established, water during prolonged dry periods.
• Feed every spring with a balanced slow-release fertiliser.
• Apply a high-potash feed every few weeks during the flowering season to encourage continuous blooms.
• Mulch annually to retain soil moisture and improve soil quality.
• Remove weeds regularly around the base of the plant.
• Pull spent flowering stems gently from the base rather than cutting them, as this encourages new shoots and additional flowers.
• Protect young shoots from slugs and snails in spring.

Pruning

Very little pruning is required.

• Remove faded flower stems by gently pulling them from the base.
• Cut away damaged or yellowing foliage throughout the growing season.
• Remove dead growth in late winter or early spring before new shoots appear.
• Divide mature clumps every 4–5 years if they become overcrowded.
• Avoid disturbing the roots unnecessarily, as Alstroemerias prefer to remain undisturbed once established.

Growing Conditions

• Botanical Name: Alstroemeria 'Summer Sky'®
• Common Name: Peruvian Lily 'Summer Sky'
• Plant Type: Herbaceous perennial
• Mature Height: 50–70cm
• Spread: 40–60cm
• Flower Colour: White with yellow and burgundy markings
• Flowering Period: June to October
• Foliage: Fresh green
• Growth Rate: Moderate
• Hardiness: Hardy throughout most of Ireland and the UK with good drainage

Ideal Uses in the Garden

Alstroemeria 'Summer Sky'® is perfect for adding long-lasting colour to many garden styles.

• Cottage gardens
• Mixed perennial borders
• Patio containers
• Raised beds
• Pollinator-friendly gardens
• Cut flower gardens
• Contemporary planting schemes
• Gravel gardens with improved soil
• Courtyard gardens
• Small garden displays

It pairs beautifully with Salvia, Nepeta, Lavender, Echinacea, Geranium, Coreopsis, Heuchera and ornamental grasses.

Seasonal Interest

• Fresh green foliage emerges in spring.
• Flower buds begin forming in early summer.
• Continuous blooms provide colour from summer until the first frosts.
• Flowers attract bees, butterflies and other pollinators.
• Excellent cut flowers for indoor arrangements.
• Foliage dies back in winter before fresh growth emerges the following spring.

Common Problems

Alstroemeria 'Summer Sky'® is generally healthy and reliable.

• Slugs and snails may feed on young shoots in spring.
• Poor drainage can lead to root rot.
• Leaves may scorch if the soil becomes too dry during hot weather.
• Aphids may occasionally appear on tender new growth.
• Ensure good airflow around the plant to minimise the risk of fungal diseases.

With its elegant flowers, exceptionally long flowering season and compact habit, Alstroemeria 'Summer Sky'® is a superb addition to any garden. Easy to grow and ideal for both borders and containers, it provides months of vibrant colour while producing beautiful cut flowers that can be enjoyed indoors throughout the summer

Kindly be aware when mix/ mixed/ assorted/ varieties is mention you will receive ONLY ONE plant/ item, which will be selected for delivery, photos may show different varieties available - which may also vary 

 
We currently only deliver within the island of Ireland, other countries can be quoted for by contacting [email protected] or via telephone on 06964084
 

Standard Delivery is FREE on orders over €250*

All standard deliveries will be completed within 5-7 working days via DPD Couriers, any delay to this delivery time, the customer will be notified by One of our staff.

The in-Store delivery charge will vary compared with online, in-store delivery charge is done on a case by case basis. 

* Only mainland Ireland addresses qualify for free delivery.
 

Live Plants Delivery

Our live plants are packed with care and diligence by our staff, our horticulturists review each plant before despatch to ensure quality is maintained.
Live Plant delivery charges are not calculated on weight but on the space required per package to ensure safe delivery, so delivery charges may vary as some plants require more space than others when packed.
All live plants are despatched within 3-5 working days where possible, our couriers aim to deliver within 48 hours of despatch from our Garden Centre to allow the plant to arrive in healthy condition.
 

Click & Collect

Can’t wait for delivery? Why not try our FREE Click & Collect service? Simply make your purchase online and collect it from our store located in Croagh Co. Limerick. Our staff will contact you by phone when your order is ready for collection (Please allow 24 hours minimum). When collecting your item, call the store on 069-64084. We will then load into your car as required. This service is available in-store 9am – 6pm Monday – Saturday (No collections on Sundays)

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