๐ฟ Crossandra (Crossandra infundibuliformis), also known as Firecracker Flower, is a beautiful tropical plant prized for its glossy foliage and colorful blooms. In this video, I show you how to keep Crossandra healthy, happy and flowering in your indoor garden. Learn what you need to know about lighting, watering, fertilizing, humidity, temperature, pruning, repotting, pests and more. See time stamps below.
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Crossandra Plant Care: How to Keep Crossandra Healthy Indoors
Welcome to HealthyHouseplants.com, where I teach you all about gardening in the great indoors.
Today, we’re talking about this beautiful Crossandra, botanically known as Crossandra infundibuliformis. We’re going to cover how to keep this colorful flowering plant healthy and happy in your indoor garden.
Crossandra is also known as the firecracker flower. It is native to India and Sri Lanka, where it grows as an evergreen tropical perennial in temperate climates. Indoors, it is most often grown as a houseplant.
Crossandra features glossy, textured, oval-shaped leaves and clusters of showy flowers that rise above the foliage on upright stems. The blooms have five asymmetrical, overlapping petals that give them a compact, fan-like appearance.
The flowers are most commonly orange, like this plant, or salmon-colored, but varieties are also available in red, yellow, and pink. Indoors, Crossandra can eventually reach about 1 to 3 feet tall.
Why Is Crossandra Called Firecracker Flower?
The common name firecracker flower comes from Crossandra’s seed pods, which can burst open when exposed to high humidity or water, scattering the seeds.
You can prevent this from happening indoors by cutting back spent flower stems before the seed pods mature. Pruning spent flowers also helps keep the plant looking tidy and can encourage additional blooms.
Crossandra Lighting Requirements
Crossandra requires bright, indirect light to grow well and continue flowering.
Place the plant in front of an eastern-facing window or near a bright northern window. You can also position it about 2 to 3 feet away from a southern-facing window.
Crossandra also grows and flowers well under full-spectrum lighting. This particular plant grows under full-spectrum lighting most of the time.
Some gentle morning sunlight is fine, but protect Crossandra from intense midday and afternoon sunlight coming through a window. Strong direct sunlight can scorch or bleach the foliage and cause the leaf edges to curl.
Signs that Crossandra isn’t receiving enough light include leggy growth, pale foliage, and few or no flowers.
Turn the plant slightly every time you water it so that all sides receive relatively even lighting.
How to Water Crossandra
Keep Crossandra’s soil evenly moist but never soggy.
This plant doesn’t like to dry out completely, but it is also susceptible to root rot when kept too wet.
Water when the surface of the soil has dried out and the pot has become noticeably lighter. If you’re using a moisture meter, water when the meter reaches around 4, and definitely before it drops to 3.
Always water Crossandra with warm water. Cold water can shock the roots and cause the plant to lose leaves and decline.
When watering, thoroughly saturate the soil until water runs from the drainage holes. Never allow the pot to sit in standing water.
Signs of underwatering include drooping foliage, dry brown leaf edges, and leaf loss.
Signs of overwatering include yellowing leaves, soft stems, consistently wet soil, and eventual root rot.
Fertilizing Crossandra
Fertilize Crossandra once a month from spring through fall with a well-balanced organic fertilizer formulated for houseplants.
Avoid overfertilizing because excessive fertilizer can burn the roots and cause salt buildup in the soil.
Crossandra can also develop iron chlorosis when grown indoors. This generally appears as yellowing in the newest leaves while the veins remain green.
Begin by feeding the plant with a well-balanced organic fertilizer. If the problem continues, check the soil pH because an unsuitable pH can prevent the plant from absorbing iron even when iron is present in the soil.
Adjust the soil pH as needed to bring it into a suitable range for Crossandra.
Humidity Requirements for Crossandra
Crossandra requires above-average humidity to perform well indoors.
A humidity level of approximately 50% to 60% or higher is a good indoor target.
You can place the plant on a humidity pebble tray, making sure the bottom of the pot remains above the water. You can also group Crossandra with other plants to increase humidity around the foliage.
Misting the foliage or using a humidifier can also help when indoor air is especially dry.
Avoid repeatedly misting the delicate flowers because excess moisture can damage the blooms.
Use a hygrometer to monitor the humidity level around the plant. Also provide good air circulation, especially when humidity is high.
Crossandra Temperature Requirements
Crossandra prefers warm temperatures.
It does especially well around 70 to 75ยฐF, but generally grows well between approximately 65 and 80ยฐF.
Protect the plant from temperatures below 55ยฐF, which can cause sudden leaf loss.
Keep Crossandra away from cold drafts, air-conditioning vents, and abrupt temperature changes.
When to Repot Crossandra
Repot Crossandra when the plant has outgrown its current container, when roots are growing from the drainage holes, or when the soil begins drying out much more quickly than usual.
Move the plant into a container no more than one pot size larger at a time, and always use a container with drainage holes.
Crossandra grows best in rich potting soil that retains some moisture while still draining well.
A high-quality houseplant potting mix amended with peat moss or coco coir and perlite or pumice works well.
Crossandra can be sensitive to root disturbance, so handle the roots carefully when repotting and avoid unnecessarily breaking apart the root ball.
How to Prune Crossandra
Prune fading flowers to encourage Crossandra to produce additional blooms.
Remove the entire spent flower stem before seed pods mature if you don’t want the pods to burst open and scatter seeds indoors.
You can also pinch back the growing tips to encourage a fuller, bushier plant.
If Crossandra becomes leggy, prune it back in early spring before active growth begins.
Generally speaking, avoid removing more than one-third of the plant at a time when pruning.
Crossandra Pests and Diseases
Crossandra isn’t especially prone to pest problems, but it can occasionally attract mealybugs, whiteflies, and spider mites.
Check the undersides of the leaves and the areas where leaves meet the stems regularly so you can catch pests before they become established.
Root rot is the most common disease problem with Crossandra. It is generally caused by overwatering, poor drainage, or allowing the pot to sit in water after watering.
Low light can prevent the plant from flowering, while cold temperatures can cause leaf drop.
Brown, dry leaf edges often indicate underwatering or insufficient humidity.
How to Propagate Crossandra
Crossandra is best propagated from stem cuttings taken early in the growing season, generally in spring or early summer.
Take a healthy tip cutting with clean pruning shears and remove the lower leaves.
Dip the cut end in rooting hormone and insert it into moist seed-starting or rooting mix.
Place the cutting beneath a humidity dome and on a seedling heat mat to provide the warmth and humidity it needs to develop roots.
Keep the rooting medium moist but not soggy, and mist as needed to maintain humidity.
Place the cutting in bright, indirect light or under full-spectrum lighting while it develops roots.
Is Crossandra Safe for Pets?
Crossandra is listed as non-toxic to cats and dogs.
Even so, it’s best to discourage pets from chewing on the plant because eating any plant material can potentially cause mild digestive upset.
So, there you go. That’s how to keep this lovely Crossandra happy and healthy in your indoor garden.
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Frequently Asked Questions About Crossandra Plant Care
What is Crossandra?
Crossandra, botanically known as Crossandra infundibuliformis, is a tropical flowering plant native to India and Sri Lanka. It is commonly grown as a houseplant and is also known as the firecracker flower.
How much light does Crossandra need?
Crossandra needs bright, indirect light to grow well and continue flowering. An eastern-facing window, a bright northern window, or a location about 2 to 3 feet from a southern window can provide suitable light. It can also grow well under full-spectrum lighting.
Can Crossandra grow in direct sunlight?
Some gentle morning sunlight is fine, but Crossandra should be protected from intense midday and afternoon sunlight. Strong direct sunlight can scorch or bleach the foliage and cause leaf edges to curl.
Why is my Crossandra not flowering?
Insufficient light can cause Crossandra to produce few or no flowers. Leggy growth and pale foliage can also indicate that the plant needs more light. Providing bright, indirect light or suitable full-spectrum lighting can encourage flowering.
How often should I water Crossandra?
Keep Crossandra’s soil evenly moist but never soggy. Water when the surface of the soil has dried out and the pot feels lighter. If using a moisture meter, water around a reading of 4 and before it drops to 3.
Can Crossandra dry out between waterings?
Crossandra does not like to dry out completely. Allowing the soil to become excessively dry can result in drooping foliage, brown leaf edges, and leaf loss.
Can you overwater Crossandra?
Yes. Crossandra is susceptible to root rot when kept too wet. Overwatering can cause yellowing leaves, soft stems, consistently wet soil, and eventual root rot.
What type of water should I use for Crossandra?
Warm water is recommended when watering Crossandra. Cold water can shock the roots and may contribute to leaf loss and plant decline.
How often should I fertilize Crossandra?
Fertilize Crossandra once a month from spring through fall with a well-balanced organic fertilizer formulated for houseplants. Avoid excessive fertilizer because it can burn the roots and cause salt buildup.
What is iron chlorosis in Crossandra?
Iron chlorosis in Crossandra generally appears as yellowing in the newest leaves while the veins remain green. It can occur when the plant cannot absorb enough iron, including when an unsuitable soil pH prevents nutrient uptake.
How much humidity does Crossandra need?
Crossandra prefers above-average humidity. An indoor humidity level of approximately 50% to 60% or higher is a good target for helping the plant perform well.
How can I increase humidity for Crossandra?
You can increase humidity by placing Crossandra on a humidity pebble tray with the bottom of the pot above the water, grouping it with other plants, misting the foliage, or using a humidifier. A hygrometer can be used to monitor humidity.
Should I mist Crossandra flowers?
Avoid repeatedly misting the delicate flowers because excess moisture can damage the blooms. Misting the foliage can be used to increase humidity when the indoor air is especially dry.
What temperature is best for Crossandra?
Crossandra grows especially well around 70 to 75ยฐF and generally performs well between approximately 65 and 80ยฐF. Protect it from temperatures below 55ยฐF, cold drafts, air-conditioning vents, and sudden temperature changes.
When should I repot Crossandra?
Repot Crossandra when it has outgrown its container, roots are growing from the drainage holes, or the soil begins drying out much faster than usual. Move it up no more than one pot size at a time and use a container with drainage holes.
What soil is best for Crossandra?
Crossandra grows best in rich potting soil that retains some moisture while draining well. A quality houseplant potting mix amended with peat moss or coco coir and perlite or pumice can work well.
How do you prune Crossandra?
Remove fading flowers to encourage additional blooms and cut off spent flower stems before seed pods mature if you want to prevent them from bursting open indoors. Pinching growing tips can encourage a fuller, bushier plant.
How much can I prune Crossandra at one time?
When pruning Crossandra, generally avoid removing more than one-third of the plant at one time. If the plant becomes leggy, pruning in early spring before active growth begins can help encourage fuller growth.
What pests attack Crossandra?
Crossandra is not especially prone to pests, but it can occasionally attract mealybugs, whiteflies, and spider mites. Regularly check the undersides of leaves and areas where leaves meet stems to detect pests early.
What is the most common disease affecting Crossandra?
Root rot is the most common disease problem with Crossandra and is generally caused by overwatering, poor drainage, or allowing the pot to sit in standing water after watering.
How do you propagate Crossandra?
Crossandra is best propagated from stem cuttings taken early in the growing season, generally in spring or early summer. Use a healthy tip cutting, remove the lower leaves, apply rooting hormone, and place the cutting in moist rooting mix.
Does Crossandra need humidity when propagated?
Yes. Crossandra stem cuttings benefit from warm, humid conditions while developing roots. A humidity dome and seedling heat mat can help provide suitable conditions. Keep the rooting medium moist but not soggy.
Is Crossandra safe for cats and dogs?
Crossandra is listed as non-toxic to cats and dogs. However, pets should still be discouraged from chewing on the plant because eating plant material can potentially cause mild digestive upset.
Why does Crossandra have brown leaf edges?
Brown, dry leaf edges can indicate underwatering or insufficient humidity. Check the soil moisture and humidity around the plant and adjust its care as needed.
Why is my Crossandra losing leaves?
Leaf loss can result from underwatering, cold temperatures, or other unsuitable growing conditions. Temperatures below 55ยฐF can cause sudden leaf loss, while improper watering can also contribute to declining foliage.
Why are my Crossandra leaves yellow?
Yellowing leaves can have several causes. Overwatering may cause yellow leaves along with soft stems and consistently wet soil, while yellowing of the newest leaves with green veins can indicate iron chlorosis.
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๐ฃ๐ฟ๐ผ๐ฑ๐๐ฐ๐๐: As an Amazon Associate I earn from qualifying purchases. I may earn commissions for purchases made through the link below.
-Hygrometer: https://amzn.to/3Cf6h2F
-ProMix BX Potting Soil (my favorite for this plant): https://amzn.to/3iVIrjE
-Crossandra plant: https://amzn.to/4wiW93j
-Full-spectrum Lighting: https://amzn.to/3qhhaiv
