Asteraceae
Sea Mayweed (Tripleurospermum maritimum)
Tripleurospermum maritimum
A tough, low-maintenance coastal wildflower best suited to sunny, well-drained sandy or gravelly spots. It tolerates salt spray, poor soil, and neglect, needing only occasional watering and virtually no feeding once established.
Every 7 days
Bright indirect
-10° - 30°C
% - %
Categories
What is Sea Mayweed?
Sea Mayweed (Tripleurospermum maritimum) is a easy-care plant from the Asteraceae family. Sea Mayweed (Tripleurospermum maritimum) is a short-lived perennial in the daisy family, native to the coasts of Europe, Greenland, and the Azores. It forms sprawling, fleshy-leaved mounds along drift-lines, shingle beaches, and cliff tops, producing classic daisy-like flowers with white ray petals...
Sea Mayweed grows up to 80cm, watering every 7 days, -10°C â 30°C. It is not suitable for indoor environments and safe for pets.
Unlike many tropical plants, Sea Mayweed tolerates watering mistakes. Best for beginners. Unlike many popular species, Sea Mayweed is safe to keep around pets.
How to Care for Sea Mayweed?
TLDR: Sea Mayweed needs Bright indirect, watering every 7 days, and temperatures between -10-30°C with 40-70% humidity.
How Often Should You Water Sea Mayweed?
Water regularly while establishing, then only during prolonged dry spells - this plant is adapted to free-draining coastal soils and dislikes sitting in wet ground.
How Much Light Does Sea Mayweed Need?
Grow in full sun to light partial shade for the best flowering display; it copes poorly with deep shade.
What Is the Best Soil for Sea Mayweed?
Use a well-draining, sandy or loamy soil; avoid heavy clay or waterlogged spots, which encourage root rot.
What Is Sea Mayweed and Where Does It Come From?
Sea Mayweed (Tripleurospermum maritimum) is a short-lived perennial in the daisy family, native to the coasts of Europe, Greenland, and the Azores. It forms sprawling, fleshy-leaved mounds along drift-lines, shingle beaches, and cliff tops, producing classic daisy-like flowers with white ray petals around a yellow disk from early summer into autumn. Its succulent, finely divided foliage is an adaptation to salty, windswept habitats, and mature stems often turn purple by late summer.
How to Propagate Sea Mayweed?
Seed sowing
Sea Mayweed self-seeds freely once established, so little intervention is needed in coastal gardens.
- 1 Scatter seeds thinly onto moist, well-draining potting mix or directly onto prepared sandy soil
- 2 Press seeds lightly into the surface but do not bury them, as they need light to germinate
- 3 Keep the soil surface consistently moist until seedlings appear
- 4 Thin seedlings once they have their first true leaves
Materials needed:
Division of established clumps
Divide only vigorous, multi-stemmed plants; this species is short-lived so division works best on younger clumps.
- 1 Lift an established clump carefully with a fork
- 2 Separate rooted sections by hand or with a clean knife
- 3 Replant divisions immediately at the same depth in well-draining soil
- 4 Water in well after planting
Materials needed:
How Big Does Sea Mayweed Grow?
TLDR: Sea Mayweed can reach up to 80cm tall with Medium growth rate.
Max height
80cm
Growth rate
Medium
Foliage
Deciduous
Plant Uses
Ornamental
Great for decoration
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
What Diseases Commonly Affect Sea Mayweed?
TLDR: Sea Mayweed is susceptible to 4 known diseases. Monitor regularly for early detection.
Aphids
Aphids are small, soft-bodied, pear-shaped insects (1/16 to 1/8 inch long) that feed by sucking nutrient-rich sap from plants. They reproduce rapidly and can quickly weaken plants, causing distorted growth and transmitting plant viruses. Aphids come in various colors including green, black, red, yellow, brown, and gray. They secrete honeydew, a sticky substance that attracts ants and encourages sooty mold growth.
Caterpillars
Caterpillars are the larval stage of moths and butterflies that feed voraciously on plant foliage, stems, flowers, and fruits. Common species include cabbage loopers, tomato hornworms, armyworms, and cutworms. These pests can cause extensive damage by consuming large amounts of plant tissue in a short time. They vary in size from small (1/4 inch) to large (5 inches), with colors ranging from green to brown, often featuring stripes or spots. Caterpillars are highly mobile and can quickly spread throughout gardens, making them one of the most destructive common pests.
Slugs and Snails
Slugs and snails are mollusks that feed on plant tissue, causing irregular holes in leaves and damage to young seedlings. They are most active at night and in moist conditions, leaving characteristic silvery slime trails. These pests can quickly devastate gardens, especially during wet seasons.
Root Rot
Root rot is a serious fungal disease that affects the root system of plants, causing them to decay and die. It is primarily caused by overwatering, poor drainage, or soil-borne fungi such as Pythium, Phytophthora, Rhizoctonia, and Fusarium. The disease thrives in waterlogged conditions where roots are deprived of oxygen, making them susceptible to fungal infection.
Fun Facts
Its fleshy, finely divided leaves store water and salt to help it survive harsh coastal conditions
Stems often turn purple in late summer and autumn
It was first documented in Gerard's Herbal in 1597
It tolerates high salinity and even elevated heavy metal levels in soil
Frequently asked questions
Is Sea Mayweed toxic to pets?
How often should I water Sea Mayweed?
Can Sea Mayweed grow in containers?
Does Sea Mayweed attract pests or diseases?
Compare with similar plants
| Attribute | Difficulty | Light | Watering | Pet Safe |
|---|---|---|---|---|
| Field Maple | Easy | Bright indirect | 14d | â |
| Silver Birch | Easy | Direct sun | 14d | â |
| Common Blanketflower | Easy | Direct sun | 10d | â |
| Cushion Bush | Easy | Direct sun | 14d | â |
