Article by Dean Ravenscroft, Ph.D. - Updated 18th Oct 2023,/small>
In this Gardener's HQ guide, we'll explore cultivating Alonsoa plants in your garden, indoor spaces, and other settings.
The common name for the half hardy perennial Alonsoa is Mask flower.
It typically flowers from early summer to late september.
Alonsoa meridonalis 'Apricot' photograph by Anniesannuals.
Alonsoa typically grow to be between 30 and 90 cm in height (one to three feet).
Mask flowers have pink, white or red petals with yellow stamens. They are normally grown as border plants or on a cutting bed.
Plants belong to the Scrophulariaceae family, and are thus closely related to the Figworts.
It is best to sow Mask flowers just below the soil surface, with a spacing of 25 to 30 cm after the last frost of spring.
Alonsoa prefers to be grown in full sunlight. The soil should be well drained, light and fertile.
Alonsoa requires between 14 days and 21 days to germinate.
If initiating growth indoors, it is best to sow them seven weeks before the last frost of spring.
Alonsoa require to be staked if they become tall, ideally they should have their meristems pinched back when they reach 75 cm tall, this will promote bushy growth.
They are a good plant to use to attract ladybirds to your garden as they are prone to aphid attacks.
Alonsoa meridionalis is a perennial that grows up to 24 inches (60 cm) tall. The Mask Flower plant features lance-shaped leaves and bright red or orange flowers.
This plant loves full sun and well-drained soil. It's ideal for beds, borders, and containers, or as a cut flower.
Alonsoa warszewiczii is a perennial. Peruvian Snapdragon reaches a height of 3 feet (91 cm). Plants have lance-shaped leaves and scarlet flowers.
They prefer a location with full sun and well-drained soil. It is perfect for mixed borders, containers, or as a cut flower.
Alonsoa linearis is a perennial plant that grows up to 24 inches (60 cm) tall. Narrowleaf Mask Flower features linear leaves and clusters of bright red flowers.
It loves full sun and well-drained soil. This plant is ideal for mixed borders, containers, or for use as a cut flower.
Alonsoa acutifolia is a perennial plant that reaches about 3 feet 4 inches (1 meter) in height. Sharp-leaved Mask Flower bears lanceolate leaves and clusters of vibrant red flowers.
It thrives in full sun and well-drained soil. It makes a great addition to mixed borders, containers, or as a cut flower.
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The Alonsoa genus contains about 12 species of flowering plants.
Yes, Alonsoa, often called mask flower, is a popular bedding plant due to its continuous blooming nature and bright, mask-like flowers.
The most commonly grown species is Alonsoa meridionalis, also known as scarlet alonsoa, due to its striking red flowers.
Alonsoa plants are not typically known for a strong fragrance, they are primarily grown for their visual appeal.
Alonsoa prefers full sun to part shade and well-drained soil. It's a great choice for borders, containers, or as a bedding plant.
Alonsoa is not presently classified as being an invasive species in the USA.
To remove Alonsoa plants, dig up the entire plant, ensuring all roots are removed to prevent regrowth, and dispose of responsibly.
The Alonsoa genus, part of the Scrophulariaceae family, contains around 12 species of annuals and perennials. One commonly grown species is Alonsoa meridionalis, also known as Mask Flower. Native to South America, these plants are known for their bright, mask-like flowers in red, pink, or white.
Alonsoa plants thrive in full sun and well-drained soil. They are often grown as bedding plants or in containers, where their vibrant blooms can be displayed to full effect. Deadheading spent flowers can help to encourage a longer blooming season, providing a splash of color throughout the summer.
I hope that you enjoyed this guide on Alonsoa. You may also enjoy the following garden growing guides: How to grow Nemesia and Verbascum plants.
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