Hydrophyllum canadense — a medium houseplant, prefers partial sun light
SPECIMEN · FROM THE LIBRARY
Hydrophyllum canadense

Hydrophyllum Canadense

Updated · 17 observations
ON THIS PLANT

Hydrophyllum canadense, known as bluntleaf waterleaf, broadleaf waterleaf, or Canada waterleaf, is a flowering plant in the borage family, Boraginaceae. It is native to the eastern United States and Canada.Hydrophyllum canadense is one of ten species of Hydrophyllum, a genus endemic to North America. It can be distinguished from other Hydrophyllum species across its range by a combination of the following features: perennial, stem leaves palmately lobed, sepals lacking appendages (or less than 0.5 mm in length), and stamens exserted 3–6 mm.

A note from PlantMom

Broadleaf waterleaf is fairly resistant to disease and generally does not suffer from it. Nonetheless, it can be vulnerable to pests and diseases present in its environment, though such issues are typically mild. Care-wise, the plant requires moderate maintenance. Regular pruning is needed to keep it looking good and to support healthy growth. Fertilizing can also help encourage flowering. Broadleaf waterleaf is suitable for anyone with outdoor space, such as a garden or patio, and does not demand extensive care experience. It may need more attention when grown indoors.

— PlantMom
CARE GUIDE

How to keep Hydrophyllum Canadense.

Light

Broadleaf waterleaf does best in filtered or dappled light and is not suited to full sun. This preference stems from its native understory environment, where it is shaded by the canopy. It can survive in very low light, but its growth may be limited. Too much light can burn the leaves, emphasizing the need for moderate lighting.

Water

Broadleaf waterleaf thrives in moist woodland environments, needing consistently damp soil and high humidity to flourish. To maintain this balance, weekly watering is crucial, especially during the rainy season when the plant is most vibrant. As an herbaceous perennial, broadleaf waterleaf's growth cycles are greatly affected by water availability.

Temperature

Broadleaf waterleaf is native to temperate regions and grows best in temperatures between 41 and 89.6 °F (5 to 32 ℃). In hotter months, providing shade and water can keep the plant cool, while a winter mulch can help maintain temperatures during colder months.

Fertilizer

Usually, one application of fertilizer in spring is enough for Broadleaf waterleaf, although several feedings can increase growth to the fullest. Apply fertilizer every month to every six weeks. Fertilizing improves the leaves' look and function, helping maintain even color and a healthy texture. It also encourages root development and better nutrient uptake for lasting plant health.

Pruning

The broadleaf waterleaf is known for its large, lobed leaves and distinctive bell-shaped flowers, which thrive in the spring. To encourage new growth and a denser appearance, it is important to prune the plant between early and late spring. This helps remove dead stems and prevents seed formation. Make sure to use sharp, clean tools for pruning to reduce the risk of disease.

CHARACTERISTICS

Botanical profile.

Plant Type
Herb
Life Cycle
Perennial
Genus
Hydrophyllum
Family
Boraginaceae
Hardiness Zone
4-8
Mature Height
30 cm to 76 cm
Mature Spread
30 cm to 40 cm
Leaf Color
Green, Gray, Silver
Leaf Type
Deciduous
Flower Color
White
Flower Size
2.54 cm
Bloom Time
Mid spring, Late spring
Planting Time
Spring, Summer, Autumn
Harvest Time
Early summer, Mid summer
ALSO KNOWN AS

Other names.

en Blunt-Leaf Waterleaf en Bluntleaf waterleaf en Broad-leaf Waterleaf en Canada Waterleaf en Blunt-leaved Waterleaf en Broad-leaved Waterleaf en Broadleaf Waterleaf en Maple-leaf waterleaf
FREQUENTLY ASKED

Reader questions.

How should I water my Broadleaf waterleaf plant?

To properly water the Broadleaf waterleaf, it is recommended to use filtered water at room temperature or slightly warmer. Tap water may contain harmful particles that can affect the plant's health. The plant prefers warmer water as it originates from a warm environment and cold water may be a shock to its system. It is advised to avoid overhead watering to prevent foliage issues. Instead, saturate the soil with filtered room temperature water until it is completely soaked. This method benefits the plant by hydrating the roots and facilitating nutrient absorption for healthy growth.

Why should I put fertilizer on my Broadleaf waterleaf?

The main structure of the Broadleaf waterleaf consists of its leaves. Fertilization is important for maintaining the appearance and function of these leaves. Proper fertilization results in consistent color and a healthy texture. Additionally, fertilization helps the plant develop new roots and maintain existing ones, improving its ability to absorb soil nutrients in the future. So, fertilizing your Broadleaf waterleaf not only keeps it healthy now but also benefits its long-term growth.

How much sunlight does Broadleaf waterleaf need to grow?

Broadleaf waterleaf thrives with 3-6 hours of direct sunlight daily, but it also needs shade during the hottest parts of the day to avoid sun damage. Morning sunlight is ideal, but it can handle some afternoon sun if it's not too hot. To achieve the right sunlight balance, consider planting Broadleaf waterleaf in a spot with partial sun, like under a tree or on the east side of a building.

What is the best temperature for Broadleaf waterleaf?

Broadleaf waterleaf has its ideal temperature range depending on the time of year. There are two main seasons to consider: the growing season and the dormancy season. During the growing season, which is when the plant starts sprouting, the temperature range of 65~80℉(18~27℃) is perfect. If it gets colder than 15℉ (-10℃), the plant may suffer and its leaves may turn brown and wilt. However, if it's just a short cold snap, the Broadleaf waterleaf may be able to survive with a little help. On the other hand, during the warmer parts of the year, it's important to protect the Broadleaf waterleaf from extremely high temperatures. The upper limit for this plant is 95-105℉ (35-40℃), anything beyond that will harm the leaves and blooms. High temperatures can cause wilting, drooping, and even sunburn, which can be difficult for the plant to recover from. Fortunately, there are simple and effective ways to address this issue.

If I give my Broadleaf waterleaf plant too much or too little water, what should I do?

Overwatering is a common issue for Broadleaf waterleaf plants and can cause wilting, yellowing, and diseases like root rot. Underwatering is less common but can lead to brittle, brown leaves. It's important to notice signs of overwatering early and reduce watering immediately. If the soil drains poorly, replace it with a well-draining mix. If the plant is underwatered, water more regularly until the signs improve.

When should I put fertilizer on my Broadleaf waterleaf plant?

If you grow your Broadleaf waterleaf outdoors each year, you can expect new growth to come in early spring. This is a sign that it's time to start fertilizing. Usually, a single application of fertilizer in the spring is enough for the plant to thrive. However, if you want to maximize its growth, you can fertilize it multiple times during the spring and early summer. In this case, you can feed the plant approximately every month to a month and a half.

What happens if Broadleaf waterleaf doesn't get enough sunlight?

Broadleaf waterleaf can experience negative effects when it gets excessive sunlight. The leaves of the plant may turn yellow, dry out, or even burn. Additionally, you may observe that the plant starts to wilt or becomes stunted. To avoid sun damage, it is essential to protect the Broadleaf waterleaf from direct sunlight during the hottest parts of the day. This can be accomplished by using a shade cloth or by planting the Broadleaf waterleaf near taller plants that can offer natural shade.

What temperature does the first year or seedling Broadleaf waterleaf need?

If this is the first year of your Broadleaf waterleaf plant being outside, it may require some extra care during the coldest months. Frost can cause significant damage and hinder its growth in the spring. To protect the plant, it should be kept at a temperature of 40℉ (5℃) or higher until it is established. This can be achieved by bringing the plant indoors for a month or two, or by using mulch or fabric barriers to prevent frost damage. During the first year or two, it is advisable to plant the Broadleaf waterleaf in a shadier location. Smaller and weaker plants struggle to maintain their temperature in hot weather, so they should be exposed to no more than five hours of direct sunlight per day. If the daytime temperature surpasses 80℉ (27℃), it is crucial to use shadecloth and provide regular watering or misting to manage the summer heat.

How often do I need to water my Broadleaf waterleaf?

If your Broadleaf waterleaf plant is in a pot, the best way to determine if it needs water is to check the soil. Stick your finger into the soil and if the top two to three inches are dry, it's time to water it. If you have planted your Broadleaf waterleaf outdoors in the ground, you can use the same method to test the soil. Once again, if the top few inches of soil have dried out, it's time to give it some water. Typically, during the spring and early fall, you will need to water this plant about once a week using this method. However, in extremely hot weather, you may need to increase the frequency to twice or more per week. That being said, mature and well-established Broadleaf waterleaf plants have a remarkable ability to tolerate drought.

When should I not use fertilizer on my Broadleaf waterleaf?

During the late fall and winter, your Broadleaf waterleaf will go through a dormant phase and stop producing new growth. In order to prevent any issues, it is best to avoid fertilizing your Broadleaf waterleaf during this time. However, if you choose to fertilize during spring and summer, it is important to gradually decrease the rate as summer approaches and the growth rate of your Broadleaf waterleaf slows down. It is generally not recommended to fertilize your Broadleaf waterleaf when the weather is unusually hot or when the soil is very dry, as this can stress the plant and lead to premature death.

What happens if Broadleaf waterleaf gets too much sunlight?

If Broadleaf waterleaf doesn't receive sufficient sunlight, it can grow tall and thin, with few leaves. Additionally, the leaves may become yellow or pale green, which indicates a lack of chlorophyll production caused by sunlight deficiency. To fix this issue, consider relocating the Broadleaf waterleaf to a sunnier location or trim nearby foliage to enable more light to reach the plant.

How do I keep Broadleaf waterleaf safe from very hot or cold weather?

To protect Broadleaf waterleaf from frost or cold damage during the growing season, there are a few measures you can take. If you're growing it in a container, you can bring the container inside in bright, indirect light until temperatures rise above 15℉(-10℃). If it's planted in the ground, you can use mulch or horticultural fabric to create a barrier around the plant to protect it from frost and cold wind. On the other hand, if temperatures exceed 80℉(27℃) in the shade during the day, you need to be careful. Broadleaf waterleaf should be exposed to only six hours or less of sunlight per day, preferably in the morning. Using shade cloth or a fine plastic mesh can help reduce direct sunlight during the hottest parts of the day. Additionally, installing a misting system can release cooling mist around the plant's base to lower ground temperatures.

PLATES
Hydrophyllum canadense leaf
PLATE 01 · leaf
Hydrophyllum canadense leaf
PLATE 02 · leaf
Hydrophyllum canadense flower
PLATE 03 · flower
ALSO IN THE LIBRARY

You might also like.