Paracress
Acmella Oleracea
Acmella oleracea, commonly known as Paracress, is a vibrant herb renowned for its unique, edible flowers and leaves. Native to South America, it is often cultivated for culinary uses and its intriguing taste, making it a favorite among gardeners and chefs alike.
Everything it needs
9 essentials at a glance
Watering
Acmella oleracea prefers consistently moist soil but is susceptible to root rot if overwatered.
Water when the top inch of soil feels dry, typically every 3-5 days in warm months and less frequently in cooler months. Signs of overwatering include yellowing leaves and a mushy stem, while under-watering may cause wilting and leaf drop.
Light
This plant thrives in full sun to partial shade, ideally receiving 6-8 hours of direct sunlight daily.
It can tolerate some shade but may become leggy if light is insufficient. A south-facing window or a spot with filtered sunlight is ideal for optimal growth.
Soil
Acmella oleracea prefers well-draining, loamy soil with a pH range of 6.0 to 7.0.
A potting mix that includes peat, perlite, and compost will provide the necessary drainage and nutrients. Ensure that the pot has drainage holes to prevent water accumulation.
Humidity
This plant enjoys moderate humidity levels around 50-70%.
To increase humidity, consider misting the leaves or placing a humidity tray filled with water and pebbles beneath the pot. Signs of low humidity stress include browning leaf tips and curling leaves.
Temperature
Acmella oleracea thrives in temperatures between 65°F to 80°F (18°C to 27°C) and is sensitive to frost.
It is best suited for USDA hardiness zones 9-11. Protect it from extreme heat and cold, as temperatures below 50°F (10°C) can cause damage.
Fertilizing
Use a balanced, water-soluble fertilizer with an NPK ratio of 10-10-10 every 4-6 weeks during the growing season.
Reduce feeding in the fall and winter months. Signs of nutrient deficiency include yellowing leaves (nitrogen), poor growth (phosphorus), and browning leaf edges (potassium).
Pruning
Prune Acmella oleracea in early spring to encourage bushier growth and remove any dead or damaged leaves.
Use clean, sharp scissors or pruning shears. Deadheading spent flowers can promote further blooming throughout the growing season.
Repotting
Repot every 1-2 years or when the plant becomes root-bound, indicated by roots growing out of the drainage holes.
Choose a pot 1-2 inches larger in diameter. Carefully remove the plant from its pot, loosen any tightly bound roots, and place it in fresh potting mix.
Propagation
Propagation can be achieved through stem cuttings or seeds.
For stem cuttings, take 4-6 inch cuttings from healthy stems, remove the lower leaves, and place them in water or moist soil until roots develop (about 2-4 weeks). Seeds can be sown indoors 6-8 weeks before the last frost or directly outdoors after frost danger has passed.
When it's unhappy
Yellowing leaves
Why it happens
Often caused by overwatering or nutrient deficiency.
How to fix it
Check soil moisture levels and adjust watering schedule. Fertilize if nutrient deficiency is suspected.
Root rot
Why it happens
Occurs due to poor drainage or overwatering.
How to fix it
Ensure proper drainage and allow the soil to dry out between waterings. Remove affected roots and repot in fresh soil if necessary.
Leggy growth
Why it happens
Insufficient light can lead to elongated stems.
How to fix it
Move the plant to a brighter location to encourage bushier growth.
Browning leaf tips
Why it happens
Can be a sign of low humidity or over-fertilization.
How to fix it
Increase humidity levels and reduce fertilizer application to prevent further browning.
Pest infestations (aphids, spider mites)
Why it happens
Pests can thrive in dry conditions.
How to fix it
Inspect regularly and treat with insecticidal soap or neem oil if pests are detected.
Care through the year
Spring
In spring, focus on pruning to encourage bushier growth and start fertilizing every 4-6 weeks as the plant begins to actively grow.
Summer
During summer, ensure consistent watering and monitor for pests. This is the peak growing season, so maintain adequate light and humidity.
Fall
In fall, reduce watering frequency as temperatures drop and prepare the plant for dormancy. Continue to fertilize until late fall.
Winter
In winter, keep the plant in a warm location and reduce watering further. Avoid fertilizing during this dormant period.
Toxicity & Safety
Acmella oleracea is considered non-toxic to pets and children. However, ingestion of large quantities may cause mild gastrointestinal upset. The leaves and flowers are edible and often used in culinary dishes.
Good to know
How often should I water my Acmella oleracea?
Water your Acmella oleracea when the top inch of soil feels dry, typically every 3-5 days during the growing season.
What kind of light does Acmella oleracea need?
This plant thrives in full sun to partial shade, requiring 6-8 hours of direct sunlight daily for optimal growth.
Can I grow Acmella oleracea indoors?
Yes, Acmella oleracea can be grown indoors as long as it receives adequate sunlight, ideally near a south-facing window.
What is the ideal temperature for Acmella oleracea?
The ideal temperature range for Acmella oleracea is between 65°F to 80°F (18°C to 27°C), as it is sensitive to frost.
How do I propagate Acmella oleracea?
You can propagate Acmella oleracea through stem cuttings or seeds. For cuttings, place healthy stems in water or moist soil until roots develop.
What are the signs of nutrient deficiency in Acmella oleracea?
Signs of nutrient deficiency include yellowing leaves (nitrogen), poor growth (phosphorus), and browning leaf edges (potassium).
Is Acmella oleracea safe for pets?
Yes, Acmella oleracea is non-toxic to pets and children, making it a safe choice for households with animals.
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