Lathyrus linifolius is a species of pea, commonly called bitter vetch or heath pea. The name bitter vetch is also sometimes used for Vicia ervilia and also for Vicia orobus. The tubers of Lathyrus linifolius were formerly used as an appetite suppressant in medieval Scotland, and this use has brought the plant to recent medical attention. Attempts are being made to cultivate the plant on a commercial scale.
Bitter vetch sweet pea is fairly disease-resistant and generally not prone to illness. However, it can be affected by pests and diseases present in its surroundings. Such infections are typically mild. Regarding care, this plant needs moderate maintenance. It requires regular pruning to keep a neat appearance and healthy growth. Fertilizing can also encourage flowering. Bitter vetch sweet pea is appropriate for anyone with outdoor space, like a garden or patio, and does not demand much experience in plant care. It may need more attention when grown indoors.
How to keep Lathyrus Linifolius.
Light
Bitter vetch sweet pea is native to habitats like forest understories and rocky areas, where it is naturally shaded. It prefers partial sun but can tolerate full sun or full shade, illustrating its versatility and hardiness.
Water
The bitter vetch sweet pea thrives in environments with consistent rainfall and moderate humidity, preferring to be watered once a week. This herbaceous plant is typically grown outdoors and flourishes especially during the rainy season, making the most of the available moisture to support its growth cycle.
Temperature
Bitter vetch sweet pea can tolerate a broad range of temperatures, but its range may still be restricted by various combinations of water and heat conditions. 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 chance of Bitter vetch sweet pea dying. In winter, protecting it from cold can help increase its survival rate.
Fertilizer
The best time to fertilize a Bitter vetch sweet pea is in early spring, as it comes out of dormancy and begins active growth. Fertilization supplies essential nutrients needed for healthy growth. Although Bitter vetch sweet pea has relatively low fertilization requirements, applying fertilizer annually can improve its survival and encourage better, longer-lasting flowers.
Pruning
Bitter vetch sweet pea is a vining perennial that produces pea-like flowers. To maintain its health and appearance, prune any dead stems between early and late spring. Additionally, remove spent blooms regularly to encourage continuous flowering. Late spring is the perfect time for major shaping, which helps improve air circulation and manage its growth for a more attractive appearance.
Botanical profile.
- Plant Type
- Herb
- Life Cycle
- Perennial
- Genus
- Lathyrus
- Family
- Fabaceae
- Hardiness Zone
- 5-9
- Mature Height
- 61 cm
- Mature Spread
- 49 cm
- Leaf Color
- Green, Dark Green
- Leaf Type
- Semi-evergreen
- Flower Color
- Purple, Pink
- Flower Size
- 1.02 cm to 1.52 cm
- Bloom Time
- Mid spring, Late spring, Early summer
- Planting Time
- Spring, Summer, Autumn
- Harvest Time
- Mid summer, Late summer, Early fall
- Native Area
- Sweden, Austria, Czech Republic, Montenegro, Bulgaria, Poland, Croatia, Slovenia, Belarus, Serbia, Russia, Lithuania, Norway, Germany, Portugal, Italy, Spain, Switzerland, Denmark, Estonia, Finland, France, Albania, Ireland, United Kingdom, Hungary, Latvia, Algeria, Belgium, Netherlands
Other names.
Reader questions.
How should I water my Bitter vetch sweet pea plant to make it thrive?
To properly water the Bitter vetch sweet pea plant, use filtered water at room temperature. Tap water may contain harmful particles, so filtered water is preferred. It is important to use room temperature or slightly warm water because the Bitter vetch sweet pea is adapted to warm environments and cold water can be a shock. Avoid overhead watering to prevent issues with the foliage. Instead, apply the filtered room temperature water directly to the soil until it is fully saturated. This helps moisten the roots and allows them to spread and absorb essential nutrients from the soil.
How much sunlight is required for a bitter vetch sweet pea (Lathyrus linifolius)?
The bitter vetch sweet pea (Lathyrus linifolius) thrives in areas that receive full sun, which means above 6 hours of sunlight daily. However, it can also grow well in partial sun, requiring about 3-6 hours of sunlight each day. It's important to observe how sunlight moves through your garden over the course of the day. Selecting locations that provide an optimal balance of light and shade will ensure the best growth conditions for your plants. Keeping this in mind will help in choosing the perfect spot to plant your bitter vetch sweet pea, ensuring it grows happy and healthy.
What should I do if I give too much or too little water to my Bitter vetch sweet pea plant?
Overwatering and underwatering can both harm your Bitter vetch sweet pea, but overwatering is more common. Too much water can cause wilting and yellowing of the stems and leaves. It can also lead to diseases like root rot, mold, and mildew, which can be fatal for the plant. Underwatering is less likely because the Bitter vetch sweet pea is drought-tolerant, but it's still possible. In that case, the leaves may become brittle and brown. It's important to recognize the signs of overwatering early to prevent irreversible damage. If you notice these signs, reduce your watering schedule and check the soil quality. If the soil doesn't drain well, replace it with a loose, well-draining potting mix. If you see signs of underwatering, simply water more regularly until the signs go away.
How often do I need to water my Bitter vetch sweet pea plant?
If your Bitter vetch sweet pea is potted, the most accurate way to determine if it needs water is by checking the soil moisture. Simply stick your finger into the soil and if the first two to three inches feels dry, it's time to water it. For Bitter vetch sweet peas grown outdoors in the ground, you can use a similar method to test the soil. Again, if the first few inches of soil are dry, it's a sign that it needs watering. During spring and early fall, you will usually need to water this plant about once a week using this method. However, when the weather gets extremely hot, you may need to increase the watering frequency to about twice or more per week. Having said that, mature and well-established Bitter vetch sweet peas have a remarkable ability to withstand periods of drought.
How much water does my sweet pea plant need?
To water your Bitter vetch sweet pea properly, don't hold back on the amount of water you use. Wait until the top two to three inches of soil are dry, then give the plant a good, deep watering. Make sure to thoroughly soak the soil, allowing excess water to flow out of the drainage holes at the bottom of the pot. If you don't see any excess water draining, you may not have given enough water. However, be careful not to let water accumulate in the soil, as this can harm the plant. If you notice that water is not draining properly, it could mean that the soil doesn't drain well, which is not good for the plant's health. If the plant is outside, it typically only needs about 1 inch of rain per week.
How should I water my Bitter vetch sweet pea plant when it is growing at different stages?
The water needs of the Bitter vetch sweet pea can vary throughout its growth stages. In the first few years or after transplanting, it requires more water to support root development and future growth. As the plant matures, it needs less water. During the bloom period, additional water may be necessary to support flower development.
How often and in what way should I water my Bitter vetch sweet pea throughout the year?
The Bitter vetch sweet pea's water needs are highest in the hottest months, particularly during the height of summer. Depending on how quickly the soil dries out, you may need to water this plant more than once a week during that time. On the other hand, during winter, the plant enters a dormant phase and requires much less water. In fact, it may not need any watering at all during the winter months. If you do choose to water it, make sure to do so no more than once a month. Excessive watering during winter can increase the likelihood of the plant contracting a disease.
What's the difference between watering my Bitter vetch sweet pea inside and outside?
The Bitter vetch sweet pea is typically grown indoors by gardeners living in non-temperate or tropical regions. When growing in containers, it's important to note that the soil can dry out faster compared to outdoor ground soil. Additionally, the presence of drying elements like air conditioning units can further increase the frequency of watering needed for the plant. However, if you choose to plant it outside and receive regular rainfall, you may not need to water it as much. On the other hand, if you grow this plant indoors, you will need to water it more frequently since relying on rainfall to hydrate the soil is not an option.
