Hemarthria altissima
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Hemarthria altissima

African jointgrass · Batavian quick grass · Limpograss · Halt grass · Red quick

Tier 1 Difficulty: easy Water: low Light: full_sun
Temperature
15–37 °C
Soil pH
5–7
Hardiness
Zone 8–11
Click count
11
Observations
7

Description

Source: leafsnap

Hemarthria altissima, variously called limpo grass, limpograss, halt grass, Batavian quick grass, swamp couch grass, red swamp grass and red vleigrass, is a species of flowering plant in the jointgrass genus Hemarthria, family Poaceae. It is native to the Old World Tropics and Subtropics; Africa, southern Europe, the Middle East, India, Southeast Asia, eastern China, and Borneo, and widely introduced as a forage in the New World, from Texas and Florida south to northern Argentina. In addition to being a valued forage for livestock, it makes a good, fragrant silage. A number of cultivars are commercially available.

Care Guide

💧 Water

Limpograss flourishes in moist, subtropical environments and requires consistent moisture, benefiting from weekly watering. Although it has moderate drought tolerance, it is best grown outdoors. In such settings, careful management of soil moisture can mimic natural rainfall patterns, encouraging optimal growth while minimizing the risk of waterlogging.

FAQ
What should I do if I give too much or too little water to my Limpograss?

Proper watering is crucial for the health of this beautiful ornamental grass. When planted in the ground, watering issues can be fixed, but in a container, it can quickly kill Limpograss if not watered correctly. Insufficient water can stunt its growth, while overwatering can lead to yellow leaves with brown tips. Underwatering can cause drooping leaves, weak seed head production, and brown spots. If you suspect watering issues, first determine if it's getting too much or too little water. In case of overwatering, stop watering immediately and allow the soil to dry out. Test for moisture before deciding if it needs more water. For underwatering, simply give the grass a deep drink and observe if it improves. Remember, deep watering promotes deep root growth, making the grass more resilient to drought and water-related problems.

How frequently do I need to water my Limpograss?

The water needs of Limpograss vary depending on its location. Generally, watering once a week is recommended. In hot climates, watering once or twice a week in the summer may be necessary. In moderate climates, watering once every seven days or more may be enough. Grass in containers requires more frequent watering than grass in the ground. Additionally, the amount of shade or sunlight the grass receives affects its watering needs. Shaded grasses require less frequent watering compared to grasses in the ground. It is important to water Limpograss only when the soil is dry. To determine if the soil is dry, you can press your finger a couple of inches into the soil or weigh the grass in a pot to see if it feels light. Lack of water may cause the grass blades to appear folded and thinner than usual. Despite its drought tolerance, regular, deep waterings will result in beautiful color. Although Limpograss is drought-resistant, it still requires care and attention. It is best to provide consistent water for optimal growth. When first planted, Limpograss needs more frequent watering until it establishes deep roots. For potted Limpograss, the soil tends to dry out quickly, especially if the pot is exposed to hot, direct sun. Testing the soil every 3 to 4 days and watering only when it feels dry is recommended. Limpograss in the ground generally requires less watering, but this depends on the type of soil. Clay soil holds water for longer periods, so it may feel dry at the surface while retaining moisture below ground. Sandy soils that drain quickly may need to be watered more often.

What should I keep in mind when watering my Limpograss in various seasons, climates, or stages of growth?

To determine if you are watering enough, observe the rate of growth of your grasses. Limpograss typically doubles in size within a year, especially during the hottest months. If you notice that the weather is hot but the grass is not growing vigorously, it may be necessary to adjust your watering schedule. In winter, you may get away with watering just once a month, but still check the soil for moisture. During the warmest months, when the grass is in a growth cycle, it will require more water than usual. However, in winter and cooler months, the need for water will be significantly reduced. Remember, it is crucial to let the soil completely dry out before watering Limpograss.

☀️ Light Full sun

Limpograss is a sun-loving, perennial herbaceous plant native to open habitats and commonly found in meadows and grasslands. It prefers full sun but can also tolerate partial sun conditions.

Ideal: Full sun
FAQ
What kind of sunlight does Limpograss require?

Limpograss is a plant that requires full sun every day, at least six hours of sunlight to keep its leaves, roots, and blooms healthy. Similarly, most perennials also need six hours of sunlight a day. However, there are some varieties like the Orange Daylily or Giant Coreopsis that can survive with just three hours of direct sunlight. It's important to note though, that while these flowering plants can survive with less sun, they won't thrive as well as they would with more sun exposure.

Can the sun harm Limpograss? How can I keep Limpograss safe from sun and heat damage?

In warm climates, some Perennial Flowering Plants may struggle with excessive heat and suffer from sun damage. They can wilt, dry out, or even experience growth problems if they are consistently exposed to the intense afternoon sun. However, not all plants require protection from the light afternoon sun. For those that are harmed by intense afternoon exposure, it is recommended to provide them with some shade in warmer climates. Gardeners can achieve this by planting these plants in areas that do not receive direct heat during the afternoon, such as under trees or behind bushes.

Should I keep Limpograss from getting too much sun?

Certain perennial plants require ample sunlight to reach their maximum bloom. However, in warmer climates, some of these plants actually benefit from less sun. For instance, individuals residing in hotter regions might find it beneficial to shade their flowering perennials during the intense afternoon sun, especially during summer months. Although many perennial flowering plants prefer partial shade in the hottest climates, there are exceptions. Take the Giant Coreopsis, for example, as it is not bothered by excessive sun exposure. These plants can flourish even when placed in the full sun during scorching weather.

What will happen if Limpograss doesn't get enough sunlight?

If your Limpograss isn't receiving enough sunlight, you will see signs of insufficient requirements in your plants. The plants will produce fewer blooms compared to those in full sun. Some plants may develop dry spots on their leaves, but overall, they will still bloom despite the lack of sunlight. However, the flowers will be smaller and less full in size.

Does Limpograss need specific sunlight care at different stages of its growth?

Limpograss is a wonderful flower for gardens, and it blooms best when it receives at least six hours of sunlight each day. To prolong the freshness of the flowers, it can be helpful to provide them with partial shade during the hottest parts of the day. When Limpograss is in its youth, it is important for gardeners to ensure that the young plants receive ample sunlight without being subjected to intense afternoon heat. On the other hand, fully mature plants should be given plenty of sun to support their healthy growth.

🌡️ Temperature 15–37.8°C

Limpograss naturally occurs in regions where temperatures are about 59 to 100 °F (15 to 38 °C). It does best in warm conditions and may need additional insulation in cooler temperatures to maintain its growth.

Ideal temperature: 15–37.8°C
FAQ
What temperature is best for Limpograss?

Plants are impacted by colder temperatures, as they adopt the temperature of the surrounding air. When exposed to sunlight, they can regain warmth, but this is not possible in winter. For the Limpograss, the optimal temperature range is typically between 70~85℉(21~30℃). They can endure temperatures as low as 20~30℉(-6~0℃), and even 15℉(-10℃), but only for a limited time as this can cause frost damage. To avoid wilting, it is important to keep the maximum temperature within the range of 70~85℉(21~30℃), and periodically mist the plants with water while providing shade.

Do I need to change the temperature for Limpograss at different stages of growth?

When growing Limpograss, it's important to research and ensure the temperature is suitable. Some growers may consider lowering the plants' thermostats during the growing season to save on HVAC costs. However, it's crucial to realize that temperature can impact flowering, pest management, and plant quality. During winter, certain Limpograss species may enter a dormant state, causing growth to stop. As the season changes and temperatures rise, the base temperature increases, resulting in faster growth of Limpograss. Species native to warmer habitats have higher optimal temperatures compared to those thriving in cooler climates. Exposing Limpograss seeds to cool temperatures can lead to variations and delays in growth. It's advisable to decrease the temperature during flowering but not during other stages. Cooler nighttime temperatures require less water, so adjust irrigation accordingly.

How can I make sure Limpograss stays warm during cold seasons?

To help the plant withstand colder temperatures, stop fertilizing to prevent new growth and promote hardiness in existing growth. You can protect the plant from the cold by building structures, like cages or trellises, around it. Another option is to use heat mats, which can gently warm the soil and maintain an ideal temperature for the Limpograss.

How can I protect Limpograss from getting damaged by extreme temperatures?

To protect Limpograss from frost during winter, cover it with cloths, tarps, burlaps, sheets, or plastic buckets. Make sure they are securely in place to act as insulators and avoid being blown away by the wind. However, be careful not to let the plastic sheets or burlap covers touch the fruit or foliage, as this can cause burns due to the transfer of cold temperatures. Once the daytime temperatures start to rise, it is safe to remove the covers.

Do I need to change the temperature for Limpograss in different seasons?

When growing Limpograss in spring, it's important to increase humidity because the air temperature is cooler during this time. Dry temperatures can stress various species, so increasing humidity helps. In the summer, the greenhouse provides a large cover and warm temperature, resulting in higher humidity levels. Look out for condensation on the greenhouse walls, as it can lead to issues with pollination and infections when the water falls on the leaves. Adjustments should be made based on the temperature, and spraying should be done on hotter days of the year.

💨 Humidity
Humidity:
🪴 Soil 5-7
Soil pH: 5-7
🌱 Fertilizer

Limpograss benefits from extra nutrients to encourage healthy new growth. In spring, applying compost around the base of the plant can supply the needed nutrition. Fertilizing helps maintain vigorous growth and improves the plant’s resistance to diseases and pests.

🪴 Pot & Repot
✂️ Pruning

Limpograss is a resilient, fast-growing grass. Prune it in early spring to encourage regrowth and improve its shape by removing dead stems and allowing for better air circulation. Regular trimming promotes denser growth, which helps ensure vigorous foraging. Always use clean, sharp tools to prevent infection.

🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity

Characteristics

Plant Type
Grass
Life Cycle
Perennial
Genus
Hemarthria
Family
Poaceae
Hardiness Zone
8-11
Mature Height
20 cm to 40 cm
Mature Spread
0 cm to 0 cm
Leaf Color
Green, Dark Green
Leaf Type
Semi-evergreen
Flower Size
0.20 cm
Bloom Time
Summer
Planting Time
Spring, Summer, Autumn
Harvest Time
Late summer, Early fall, Mid fall
Native Area
Lesotho, Egypt, Turkey, India, Angola, Namibia, Madagascar, Rwanda, Nigeria, Morocco, Tanzania, Russia, Mali, Iraq, Cameroon, Ethiopia, Botswana, Tunisia, South Africa, Zambia, Sudan, Laos, Greece, China, Italy, Spain, Vietnam, Myanmar, Senegal, Eswatini, Algeria, Congo (DRC), Thailand

Tags (5)

Common Names (10)

en African jointgrass
en Batavian quick grass
en Limpograss
en Halt grass
en Red quick
en Red swamp grass
en Snake grass
en Swamp couch
en Red swampgrass
en Batavian quickgrass