Calderona Amarilla
Galphimia Glauca
Galphimia glauca, commonly known as Calderona Amarilla, is a vibrant flowering shrub native to tropical regions. Its bright yellow flowers and lush foliage make it a popular choice for gardens and landscapes, adding a splash of color and attracting pollinators.
Everything it needs
9 essentials at a glance
Watering
Galphimia glauca prefers consistently moist soil, requiring watering every 1-2 weeks.
During the growing season (spring and summer), increase frequency to once a week, ensuring the top inch of soil dries out between waterings. In the fall and winter, reduce watering to every 2-3 weeks. Signs of over-watering include yellowing leaves and root rot, while under-watering can cause wilting and leaf drop.
Light
This plant thrives in full sun, ideally receiving 6-8 hours of direct sunlight daily.
It can tolerate partial shade but may not flower as abundantly. Ideal placement includes south or west-facing windows or outdoor areas with ample sunlight. Avoid areas with deep shade, as this can hinder growth and flowering.
Soil
Galphimia glauca prefers well-draining soil with a pH range of 6.0 to 7.0.
A mix of potting soil, sand, and perlite or grit is recommended to enhance drainage. Ensure the pot has drainage holes to prevent water accumulation, which can lead to root rot.
Humidity
This plant enjoys moderate humidity levels around 40-60%.
To increase humidity, consider misting the leaves or placing a humidifier nearby. Conversely, if humidity is too high, signs of stress may include leaf drop and fungal issues. Ensure good air circulation to mitigate these problems.
Temperature
Galphimia glauca thrives in temperatures between 65-80°F (18-27°C).
It is hardy in USDA zones 9-11 and can tolerate brief periods of heat up to 95°F (35°C) but should be protected from frost. In cooler months, keep it in a warm spot away from drafts.
Fertilizing
Use a balanced liquid fertilizer with an NPK ratio of 10-10-10 every 4-6 weeks during the growing season.
Reduce feeding in fall and winter when growth slows. Signs of nutrient deficiency include yellowing leaves, stunted growth, and poor flowering.
Pruning
Prune Galphimia glauca in late winter or early spring before new growth begins.
Use sharp, clean pruning shears to remove dead or damaged branches and to shape the plant. Deadheading spent flowers encourages more blooms. Regular pruning helps maintain a bushy appearance and promotes healthy growth.
Repotting
Repot Galphimia glauca every 1-2 years or when it 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. Water thoroughly after repotting.
Propagation
Propagation can be achieved through stem cuttings or seeds.
For stem cuttings, take 4-6 inch cuttings from healthy stems in spring or early summer. Remove lower leaves, dip the cut end in rooting hormone, and plant in moist potting mix. Keep the soil moist and in a warm location until roots develop, which can take 4-6 weeks. For seeds, sow in spring after the last frost, covering lightly with soil and keeping moist until germination.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or nutrient deficiency.
How to fix it
Check soil moisture and reduce watering frequency. Fertilize with a balanced fertilizer if nutrient deficiency is suspected.
Wilting leaves
Why it happens
Under-watering or extreme heat.
How to fix it
Increase watering frequency and ensure the plant is in a suitable temperature range.
Poor flowering
Why it happens
Insufficient sunlight or lack of nutrients.
How to fix it
Ensure the plant receives full sun and consider fertilizing to promote blooming.
Leaf drop
Why it happens
Sudden temperature changes or high humidity.
How to fix it
Keep the plant in a stable environment and avoid drafts. Adjust humidity levels as needed.
Root rot
Why it happens
Over-watering and poor drainage.
How to fix it
Allow the soil to dry out before watering again, and ensure the pot has adequate drainage.
Care through the year
Spring
In spring, increase watering as the plant begins to actively grow. Fertilize every 4-6 weeks and prune any dead or damaged branches.
Summer
During summer, ensure the plant receives full sun and monitor for watering needs, as it may require more frequent watering in hot weather.
Fall
In fall, gradually reduce watering as the plant's growth slows. Continue to fertilize until late fall, then stop for the winter.
Winter
In winter, keep the plant in a warm location and reduce watering to every 2-3 weeks. Avoid drafts and monitor for humidity levels.
Toxicity & Safety
Galphimia glauca is considered non-toxic to pets and children. However, ingestion of large quantities may cause mild gastrointestinal upset. Always monitor children and pets around plants.
Good to know
How often should I water my Galphimia glauca?
Water your Galphimia glauca every 1-2 weeks, allowing the top inch of soil to dry out between waterings. Increase frequency during the growing season.
What light conditions are best for Calderona Amarilla?
Galphimia glauca thrives in full sun, requiring at least 6-8 hours of direct sunlight daily for optimal growth and flowering.
What type of soil is ideal for Galphimia glauca?
Use well-draining soil with a pH of 6.0 to 7.0. A mix of potting soil, sand, and perlite is recommended for best results.
How can I propagate my Calderona Amarilla?
You can propagate Galphimia glauca through stem cuttings or seeds. For cuttings, take healthy stems in spring, and for seeds, sow in spring after frost.
Why are the leaves on my Galphimia glauca turning yellow?
Yellow leaves can indicate over-watering or nutrient deficiency. Check soil moisture and consider fertilizing if necessary.
When should I prune my Calderona Amarilla?
Prune Galphimia glauca in late winter or early spring before new growth begins to maintain shape and encourage blooming.
Is Galphimia glauca safe for pets and children?
Yes, Galphimia glauca is non-toxic to pets and children, but ingestion of large amounts may cause mild gastrointestinal upset.
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