Acmispon americanus — a medium houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Acmispon americanus

Acmispon Americanus

Updated · 21 observations
ON THIS PLANT

Acmispon americanus, known by the common names American bird's-foot trefoil and Spanish clover, is a species of legume native to most habitats of California, the Western United States, Western Canada, and northern Mexico.

A note from PlantMom

Spanish clover has strong resistance to disease and is generally unlikely to suffer from illnesses. Still, it can be vulnerable to pests and diseases present in its environment. These problems are generally not serious. Regarding care, this plant needs a moderate level of maintenance. It should be pruned on a regular basis to preserve a good appearance and healthy growth. Applying fertilizer can also encourage flowering. Spanish clover is appropriate for anyone with outdoor space, such as a garden or patio, and does not demand extensive care experience. It may need additional attention when cultivated indoors.

— PlantMom
CARE GUIDE

How to keep Acmispon Americanus.

Light

Spanish clover comes from bright, open habitats where it thrives in full sun. It can tolerate partial sun but prefers direct sunlight for optimal growth. This plant, which may be annual or biennial, is known for its sun-loving nature.

Water

Spanish clover, native to arid regions, is highly drought-tolerant. It thrives with weekly watering, as long as the soil doesn't become waterlogged. The plant's growth cycle is influenced by seasonal rains, which trigger phases of active growth and dormancy. This characteristic underscores its adaptation to low-moisture environments.

Temperature

Spanish clover can tolerate a wide range of temperatures, but its distribution may still be limited by different combinations of water and heat. It performs best in warm summer climates with sufficient rainfall or irrigation. Extended periods of cloudy, rainy weather or sustained high temperatures can raise the likelihood of Spanish clover dying. In winter, protecting it from cold can increase the plant's chances of survival.

Fertilizer

Spanish clover benefits from frequent, mild fertilizer applications to encourage healthy leaf growth. You should fertilize Spanish clover about once a month during the summer months. Nitrogen is essential for foliage, and providing nitrogen-rich sources helps Spanish clover thrive.

Pruning

Spanish clover thrives when pruned strategically from early to late spring, which promotes healthy growth and abundant flowering. Remove any dead stems and thin out crowded areas to improve air circulation. Regular pruning not only helps form a strong structure, but also reduces pests. Tailored trimming encourages new growth and enhances the plant's overall vigor.

CHARACTERISTICS

Botanical profile.

Plant Type
Herb
Life Cycle
Annual
Genus
Acmispon
Family
Fabaceae
Hardiness Zone
7-10
Mature Height
20 cm to 46 cm
Mature Spread
30 cm
Leaf Color
Green, Dark Green
Leaf Type
Deciduous
Flower Color
Yellow, Orange
Flower Size
0.51 cm
Bloom Time
Mid spring, Late spring, Early summer, Mid summer
Planting Time
Spring, Summer, Autumn
Harvest Time
Summer, Early fall
ALSO KNOWN AS

Other names.

en American Deerweed en American bird's-foot trefoil en Prairie Trefoil en American deer-vetch en Spanish clover en Prairie bird's-foot trefoil en Prairie deer-vetch en Western prairie trefoil en Deervetch en Spanish lotus
FREQUENTLY ASKED

Reader questions.

How should I water my Spanish clover?

To water Spanish clover, you have several options. You can use a garden hose with a spray nozzle, a watering can, or any other common watering tool. Spanish clover is not too particular about how it gets its water, as it can thrive with rainwater, tap water, or filtered water. However, it's best to avoid watering this plant from above, as it can harm the leaves and flowers and may cause disease. Instead, a drip irrigation system is often the most effective method for watering Spanish clover. These systems distribute water evenly and directly to the soil. If you have a container-grown Spanish clover, the same principle applies, but you can use a cup, watering can, or your tap to water the soil directly.

How many hours of sunlight does Spanish clover need each day to grow well?

In order to ensure the optimal growth of the plants, it is important to provide them with a minimum of 6 to 8 hours of sunlight each day. Specifically during the summer, it is beneficial to expose them to more morning light. The Spanish clover is particularly reliant on sunlight and requires as much as possible. The amount of light these species receive directly affects their ability to produce food, showcase vibrant blooms, and ultimately survive.

What should I do if I give my Spanish clover too much water or not enough water?

To solve the problem of underwatering Spanish clover, simply water it more regularly when you notice it lacks moisture. Overwatering, on the other hand, can be more serious. It can cause diseases that lead to the death of the plant. To prevent overwatering, choose a location with plenty of sunlight and good drainage. If you overwater Spanish clover in a pot, consider repotting it in soil with better drainage and using a pot that drains efficiently.

What kind of sunlight does Spanish clover need?

The Spanish clover thrives in full sunlight. To ensure even sun exposure, avoid crowding them together. The leaves need a good amount of sunlight, so be careful not to starve them. If you plant them in pots, place them in windows that receive direct sun and make sure they get full sunlight year-round. Partial or filtered light may lead to weak stems and unhealthy flowers. It is ideal to always keep the Spanish clover exposed to the sun.

How frequently should I water my Spanish clover?

Spanish clover needs regular watering throughout the growing season. In spring, you should water it once a week. As the season progresses and it gets warmer, you may need to water it two to three times a week. However, watering it more than that can harm the plant. Regardless of how often you water, the soil should be moist but not wet. Watering Spanish clover in a pot is different. The soil in a pot dries out faster, so you'll need to water it more frequently. Usually, you should water a potted Spanish clover a few times a week, compared to just once a week for a plant in the ground.

Does sunlight harm plants? How can Spanish clover be shielded from sun and heat damage?

During hot summer days when the temperature goes above 90℉(32℃), Spanish clover can be damaged by extreme heat, especially if exposed to long hours of sun. It's best to provide some shade in the afternoon to protect them. Remember that the sun in summer is stronger and sunlight exposure is 50% longer than in winter. If the Spanish clover is stressed from too much sun, make sure to keep them well-watered. Wait until the top 2 inches of soil are dry before watering and consider moving container plants indoors if it's too hot outside. It's normal for the plant's leaves to wilt during the day and recover at night. However, if the Spanish clover remains droopy, it means it's losing water quickly and needs to be watered.

How much water should I give to my Spanish clover plant?

Determining the appropriate amount of water for your Spanish clover can be done in a few ways. Some gardeners prefer to assess the soil moisture level by feeling it. This method suggests watering until the top six inches of soil feel moist. Alternatively, you can use a specific measurement as a guideline. Typically, providing about two gallons of water per week to your Spanish clover should suffice, considering factors such as heat and soil dryness. However, blindly following this measurement may result in overwatering if your plant requires less. When growing Spanish clover in a container, a different approach is needed. The goal is to moisten all layers of dry soil. You can test this by inserting your finger into the soil, or by watering until you see a slight trickle of excess water from the pot's drainage holes.

Should I keep Spanish clover away from the sun?

The Spanish clover is a plant that thrives in sunny conditions and does not require protection from the sun. In fact, they love the sun and some species are heliotropic. It is recommended to plant them in south-facing gardens whenever possible so they can be exposed to the sun from morning to afternoon. However, it's important to note that excessive sun exposure may result in sunburn for some plants. To prevent this, you can provide protection from the afternoon and midday sun by placing them in the shade of a tree or a wall. It's not suitable to grow Spanish clover in shady areas as the larger flowers would require a lot of energy to grow and produce. For optimal results, always ensure that they are in an area with full sun and provide the necessary lighting conditions.

How can I know if I am giving enough water to my Spanish clover?

Avoiding overwatering your Spanish clover can be challenging due to the plant's deep roots that require weekly watering. However, Spanish clover is prone to root rot and browning if overwatered. Underwatering is less common as these plants can survive without supplemental watering for some time, but if deprived of water for too long, wilting and dry leaves may occur.

What happens if Spanish clover doesn't get enough sunlight?

If the Spanish clover does not receive enough sunlight, its photosynthetic process will slow down. This lack of sunlight causes the stems to become thin and long, as they try to find more sunlight, resulting in leggy growth. Furthermore, the clover will not bloom or produce seeds in shady conditions. Insufficient sunlight can also lead to the death of older leaves, lighter coloration of new leaves compared to old foliage, and smaller new growth. Despite the clover's love for sunlight, it can suffer from wilting in extreme heat and ultraviolet light during the summer months. To protect the leaves and flowers from scorching, it is advisable to cover them with a net that offers green shade, especially in the summer. If grown indoors, a fan can help reduce the heat.

How do I water my Spanish clover during different seasons?

As the seasons progress, keep in mind that the water requirements for your Spanish clover will change. During the spring, it is recommended to water your plant approximately once a week. However, as the summer heat arrives, you will need to increase the frequency and give your Spanish clover a bit more water, sometimes up to three times per week. This is especially important to note if your Spanish clover is planted in a container, as the soil in containers tends to dry out faster in warm weather. On the other hand, in the autumn when your Spanish clover is still flowering, it may require slightly less water as the temperature decreases and the sun's intensity decreases compared to summer.

Does Spanish clover require special attention to sunlight at different stages of its growth?

The Spanish clover, while growing, requires more light compared to mature plants. Younger plants should receive sufficient light, but they might not be accustomed to sudden exposure to full sunlight, particularly if they are cultivated in a nursery. These plants can be more sensitive to the intense summer sun, so the transition to bright lighting should be gradual and slow.

PLATES
Acmispon americanus leaf
PLATE 01 · leaf
Acmispon americanus leaf
PLATE 02 · leaf
Acmispon americanus flower
PLATE 03 · flower
Acmispon americanus flower
PLATE 04 · flower
Acmispon americanus habit
PLATE 05 · habit
Acmispon americanus habit
PLATE 06 · habit
ALSO IN THE LIBRARY

You might also like.