Planting Alstroemerias

Where to plant Alstroemeria?

Alstroemerias love the sun but also tolerate partial shade. A sunny exposure for at least half the day is ideal to encourage flowering. However, avoid excessively scorching spots, especially in regions with very hot summers. They prefer light, well-drained soils rich in humus. Heavy or clay soil may lead to root rot problems. If your soil is compact, don’t hesitate to amend it with sand and compost to improve its structure and drainage. Alstroemerias need the soil to be moist when in flower but dry during their winter dormancy. Well-drained soil in winter will ensure better survival than waterlogged conditions. Choose their location carefully, as once planted, alstroemerias dislike being moved!

When to plant Alstroemerias?

We recommend planting alstroemerias in spring (April-May), once the risk of frost has passed. This allows the plant to establish itself during the warmer months, maximising its growth before the cooler temperatures of autumn and winter arrive. In regions with mild winters, autumn planting (September-October) is possible. However, in areas with harsh winters, it’s best to wait until spring to plant your alstroemerias.

How to plant them?

Here are the steps to successfully plant your Alstroemerias:

• Start by preparing the soil by removing weeds and loosening the earth to a depth of about 20 cm. Add compost or potting soil to enrich the soil and improve its structure. To work your soil, you can use a hand rake, a claw, or a broadfork.
• If planting potted or root-balled Alstroemerias, soak them in a bucket of water for a few minutes before planting. This will rehydrate the roots and help them establish more easily.
• Dig a hole about twice the size of the root ball, roughly 15 cm deep and 20 cm wide. Space the holes according to the chosen variety and the required distance between each plant.
• Place the root ball in the centre of the hole, ensuring the crown (base of the stem) is level with the soil. Backfill with the loosened soil, then gently firm around the plant to ensure good root-to-soil contact. If planting multiple specimens, space them about 20 cm apart.
• Water generously after planting to settle the soil and encourage root establishment.

Keep the soil slightly moist for the first few weeks after planting, then gradually reduce watering according to the plant’s needs and weather conditions. Also consider mulching for their first winter in the ground. During flowering, water lightly and remove spent blooms to encourage new flowers.

By following these tips, you’ll give your Alstroemerias the best chance to thrive and enjoy their stunning blooms for many weeks. Don’t hesitate to mix different Alstroemeria varieties to create colourful, harmonious flower beds in your garden.