Archontophoenix alexandrae
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Archontophoenix alexandrae

Alexandra Palm · Picabeen palm · King palm · Northern bangalow palm

Tier 1 Difficulty: easy Water: low Light: partial_sun Toxicity: low
Water every
14 days
Temperature
20–35 °C
Soil pH
6–7
Hardiness
Zone 10–11
Click count
107
Observations
37

Description

Source: leafsnap

Archontophoenix alexandrae, commonly known as Alexandra palm, king palm, Northern Bangalow palm, or feather palm, is a palm endemic to Queensland, Australia. It was named in honour of Princess Alexandra of Denmark, but is often erroneously referred to by the misnomer Alexander palm.

Care Guide

💧 Water Every 2 weeks

Originating in the rainforests, the Alexandra Palm thrives in high humidity and consistently moist soil. Watering it every two weeks helps prevent over-saturation. Typically grown outdoors, the Alexandra Palm benefits from a rainfall pattern similar to its native climate, which enhances its growth cycles and overall health.

Suggested frequency: Every 2 weeks
FAQ
How should I water my Alexandra Palm tree?

Watering your Alexandra Palm is not a complicated task as it is not too particular about the watering method. You can use common watering tools such as watering cans, hoses, or even cups to moisten its soil. Regardless of the tool you choose, it is important to water the soil directly, ensuring that all areas receive an equal amount of moisture. Using filtered water is recommended to avoid harmful particles present in tap water. Additionally, using water at or slightly above room temperature is ideal to prevent any shock to the plant. However, the Alexandra Palm generally responds well to any type of water you provide.

What should I do if I give my Alexandra Palm plant too much water or too little water?

Outdoor plants, especially new ones or seedlings, are often susceptible to lack of watering. It is important to consistently water them for a few months, especially when they are small or just planted. Once the roots are established, the Alexandra Palm can rely on rain most of the time. When the Alexandra Palm is planted in pots, overwatering is more likely to happen. If you accidentally overwater your plant, it's important to take immediate action to address the situation. First, stop watering the plant to minimize the impact of overwatering. Then, remove the Alexandra Palm from its pot to check its roots. If there is no root rot present, you can return the plant to its container. However, if you find any signs of root rot, trim away the affected roots and consider applying a fungicide to prevent further damage. Finally, repot the Alexandra Palm using well-draining soil. In the case of underwatering, simply water the plant more frequently. This is usually an easy fix. If the plant's leaves droop, dry out, or fall off due to underwatering, they will quickly regain fullness after sufficient watering. Be sure to adjust your watering frequency as soon as you notice signs of underwatering.

How much should I water my Alexandra Palm?

If your area lacks rainfall, give your plants adequate watering every 2 weeks in the spring and fall. In the summer, water more frequently. In winter, water less often as growth slows down. For the Alexandra Palm, water more frequently when it is young or newly planted to help it establish and grow. When watering potted Alexandra Palms, you can set a predetermined schedule, but this may not always be accurate for your specific environment. It's better to water based on soil moisture. Wait until the first 2 to 4 inches of soil have dried out completely before watering again. Adjust your watering frequency based on the season and the plant's water needs.

How much water does my Alexandra Palm plant require?

To water your Alexandra Palm effectively, you don't always need to use a large amount of water. Instead, if only a small portion of the soil has dried since the last watering, you can give it about five to ten ounces of water. You can also judge how much water to give based on the moisture of the soil. If you notice that more than half of the soil has dried, it's a good idea to give more water. In these cases, keep watering until you see excess water draining from the pot's drainage holes. If your Alexandra Palm is planted in an area where it receives plenty of rain, you may not need to provide extra watering. However, when the palm is young or establishing itself, make sure it gets 1-2 inches of rain per week. As it grows, it can rely solely on rainwater, except in hot weather with no rainfall for 2-3 weeks. In those instances, give your palm a thorough watering to prevent stress.

How can I know if I am watering my Alexandra Palm tree enough?

Overwatering is a common issue for the Alexandra Palm, and there are clear signs to watch out for. When overwatered, the palm's leaves turn yellow and may fall off. Excessive watering can also cause the plant's structure to shrink and lead to root rot. Conversely, an underwatered palm will start to droop and may have brown or brittle leaves. Regardless of whether you see signs of overwatering or underwatering, it's important to take action and revive your Alexandra Palm's health.

☀️ Light Partial sun

Alexandra Palm does best in locations where it gets a substantial amount of sun without being completely exposed. It can tolerate areas with full sun intensity. However, excessive exposure may interfere with its optimal growth. Coming from a habitat with strong sun exposure, its different growth stages are not notably affected by changes in sunlight.

Ideal: Partial sun
FAQ
How much sunlight does Alexandra Palm need each day?

When growing Alexandra Palm indoors, it requires a lot of indirect, filtered, or dappled light. It's important to keep them in a sunny location throughout the day. The amount of natural daylight can vary based on the season, but a rule of thumb is to provide a minimum of 6 hours, including 3-6 hours of direct sunlight. Alexandra Palm can handle many hours of indirect sunlight without any issues, but direct sunlight should be monitored and controlled.

What kind of sunlight does Alexandra Palm require?

Alexandra Palms in their natural habitat receive ample sunlight throughout the day. However, this sunlight is mostly indirect and dappled as it filters through the dense leafy canopy of tall trees overhead. When grown indoors, it is important to provide Alexandra Palms with bright indirect light. This can be achieved by placing them on a sunny windowsill or by using grow lights.

Does Alexandra Palm have to stay out of the sun?

To ensure the well-being of the Alexandra Palm, it is not necessary to completely avoid sun exposure. However, it is important to consider the type of sunlight it receives. Specifically, the plant should not be exposed to more than 6 hours of direct sun per day. Direct sun refers to sunlight that directly hits the plant. On the other hand, indirect light could either be sunlight reflected off nearby objects or filtered direct sun, such as when it passes through a sheer curtain. Therefore, it is recommended to shield the Alexandra Palm from excessive direct sun.

How can I keep the Alexandra Palm safe from the sun and heat?

Alexandra Palms that are not equipped to grow in direct sunlight can be damaged by it. To shield them from intense sunlight, there are a few options to consider. Start by selecting a spot that receives more indirect light throughout the day. If the chosen location is still too bright, you can relocate the plant further into the room, away from the window. Another effective measure is to cover the window with a light curtain or blinds. These methods help safeguard your Alexandra Palm from potential harm such as sun scorching and excessive heat.

What happens to Alexandra Palm if it receives too much sunlight?

Direct sunlight can be harmful to the plant's leaves, especially the upper leaves that receive the most sun. When leaves get scorched, they develop brown and dry spots. Entire leaves may also wilt and turn brown. Growing the plant in full sun can lead to the soil drying out too quickly. In extreme situations, excessive sun exposure can even result in the plant dying.

🌡️ Temperature 20–35°C

The Alexandra Palm is a plant that does best in its native subtropical environment and prefers temperatures between 68 and 95 °F (20 and 35 ℃). During cooler periods, it is recommended to bring the surrounding temperature closer to that range to maintain healthy growth.

Ideal temperature: 20–35°C
FAQ
What temperature is best for Alexandra Palm?

To help your tropical plants thrive, it's best to maintain a temperature range of 75℉ to 90℉ (25-32℃). While different species can tolerate temperatures outside this range, sticking within a few degrees of these limits will ensure optimal growth. However, there are extreme temperature limits to be aware of. Anything below 50℉ (10℃) or above 95℉ (35℃) can hinder growth and cause issues with the leaves and stems. Low temperatures are particularly damaging, as even a light frost can lead to the death of your tropical plants. In fact, cellular death can occur rapidly, with some species dying within 12 to 24 hours.

Is it necessary to have different temperatures for each growing phase of Alexandra Palm?

Alexandra Palm does not require temperature changes to enter different growing phases, but it is important to maintain consistency. Fluctuations in temperature can slow down its growth regardless of its current phase, so it is best to keep it in a controlled environment. The optimal temperature range for this plant is between 75℉ and 90℉ (25-32℃), and it is especially important to ensure that the temperature does not drop below 50℉ (10℃) or, even worse, 40℉/5℃, as this can directly damage the plant. While temperatures above 90℉ (32℃) are not ideal, the plant, being tropical, can tolerate higher temperatures without suffering too much.

Does Alexandra Palm require varying temperatures for various seasons?

Alexandra Palm does not require different temperatures for different growing seasons. The key to seasonal care is maintaining the environment at an optimal temperature. To achieve this, it is recommended to keep the plant indoors. By doing so, you have control over the temperature, regardless of the outdoor climate. Adequate lighting is also crucial for tropical species like Alexandra Palm. These plants prefer partial sun exposure, meaning the light they receive should be dappled or filtered. When growing your plants indoors, it is best to provide bright but indirect light. Excessive direct sunlight can harm the leaves and hinder the plant's growth.

What temperatures are best for keeping your Alexandra Palm healthy?

Here are three tips to help you take care of your plants: 1. Keep your plants away from windows during colder months: Cold air can leak into your home through cracks in the windows, and any plants placed near them will be affected. Move tropical plants to an area with bright but indirect light, while avoiding potential drafts. 2. Watch out for dry patches, which may indicate too much sunlight or heat: If you notice white or scorched leaves, your plant may be getting too much heat or sunlight. This can lead to dehydration and hinder growth. Dry spots can spread and eventually cause your plants to die if left unaddressed. 3. Be cautious of frost: Colder temperatures and frost can damage plants by disrupting their water circulation. This can lead to a lack of moisture in the stems and leaves. Look out for signs of hydrosis (a water-soaked appearance) and if the issue persists, the plant may shrivel and turn dark brown or black, eventually leading to death.

How can I keep my Alexandra Palm at the right temperature?

To maintain the ideal temperature range for Alexandra Palm, it's important to consider both the climate and humidity. Ideally, place the plant in a room where you can control the temperature, mimicking its natural habitat. Don't forget to monitor the humidity levels as well, as they directly affect the temperature. You can increase humidity by using a humidifier or misting the leaves with water. If you plan to grow this species outdoors, it may be challenging to maintain the right temperature and humidity. In such cases, it's best to bring the plant indoors to a controlled environment. This will help the plant thrive and reach its full potential.

💨 Humidity
Humidity:
🪴 Soil 6-7
Soil pH: 6-7
🌱 Fertilizer Every 30 days

The best time to fertilize an Alexandra Palm is in early spring, as it comes out of dormancy. This encourages overall growth and flower development. Fertilizing improves the foliage, stems, and branches, while encouraging large, vibrant, and long-lasting flowers. It helps move nutrients from the roots to the flowers and boosts the plant's health and resistance to disease.

Suggested frequency: Every 30 days
FAQ
Why should I add fertilizer to my Alexandra Palm?

Alexandra Palms require regular fertilization because their showy leaves require a lot of energy to produce and maintain. However, it's not just the leaves that need energy – the palm also needs to support the growth of its stems, branches, roots, and other vital structures. If you neglect fertilization, there are two likely outcomes. Firstly, the leaves will lose their natural color and texture, resulting in an overall unhealthy appearance that diminishes its ornamental appeal. Secondly, the palm's growth will slow down or produce weak growth that is susceptible to breakage.

When should I fertilize my Alexandra Palm?

Alexandra Palm plants do not require a standard feeding schedule, as occasional feedings are sufficient. You can easily fertilize the plant by applying fertilizer whenever you water it. Additionally, during the growing season, make sure to provide a good amount of water. Feeding the plant once every two to three weeks is recommended, especially when it is producing new growth.

When is it not a good idea to add fertilizer to my Alexandra Palm?

You can maintain a regular fertilization schedule for your Alexandra Palm during spring, summer, and early fall. However, during winter, it is important not to fertilize this plant. During winter, the Alexandra Palm enters a dormant growth phase where it either produces no new growth or very little. Since the plant is using less energy during this time, fertilization is unnecessary.

What kind of fertilizer does my Alexandra Palm plant require?

The fertilizer for an Alexandra Palm contains a specific blend of nutrients, each present in relatively low amounts. An ideal fertilizer should have an N-P-K ratio of 3-1-2. However, a general-purpose fertilizer with an even blend of nutrients can also work well in some cases. When using a balanced fertilizer, the ratio number representing each nutrient should be 3 or lower. You can choose between granular or liquid-based fertilizer. If you opt for a liquid-based fertilizer, it is often best to dilute the strength by half. Granular fertilizer has few downsides, but liquid fertilizer is generally more sensible to use, especially if you water your Alexandra Palm while feeding it.

How do I give nutrients to my Alexandra Palm plant?

One of the easiest ways to fertilize an Alexandra Palm is to feed it every time you water it. To do this, you will need fertilizer and a water container, such as a watering can. Dilute the fertilizer by mixing it with water. Then, pour this diluted mixture onto the soil, making sure it reaches the roots. Alternatively, you can use a granular fertilizer. Simply sprinkle the fertilizer on the soil where your Alexandra Palm is located. Granular fertilizers are slow-release, so you don't have to fertilize as often as you would with a liquid fertilizer. Whichever method you choose, it is important to water your Alexandra Palm while you feed it.

🪴 Pot & Repot 1-2 years

Repot your Alexandra Palm every 1 to 2 years in the spring to encourage healthy growth. Choose a deep, well-draining pot that is slightly larger than the current one. Place the plant in indirect light and ensure it receives consistent moisture to aid its recovery. Minimal pruning is required, which makes post-repotting care simpler.

Suggested frequency: 1-2 years
✂️ Pruning

The Alexandra Palm thrives in warm climates and is known for its tall trunk and feather-like fronds. To promote healthy growth, prune this plant in early spring by removing any dead or yellowing fronds. This helps improve air circulation and allows more light to reach the plant. Be sure to use sharp, clean tools to minimize damage and reduce the risk of disease. Avoid cutting any green fronds.

🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity

Characteristics

Plant Type
Tree
Life Cycle
Perennial
Genus
Archontophoenix
Family
Arecaceae
Hardiness Zone
10
Mature Height
12.19 m to 18.29 m
Mature Spread
3.05 m to 4.88 m
Leaf Color
Green, Silver, Gray
Leaf Type
Evergreen
Flower Color
Cream, White, Yellow
Flower Size
2.54 cm
Bloom Time
Summer, Early fall, Mid fall
Planting Time
Summer, Autumn
Harvest Time
Fall, Early winter, Mid winter
Native Area
Australia

Tags (7)

Common Names (4)

en Alexandra Palm
en Picabeen palm
en King palm
en Northern bangalow palm