Lathyrus nevadensis, the Sierra pea or purple peavine, is a perennial herb with erect to climbing stems, native to the forests and clearings of western North America from British Columbia to northern California and as far east as Idaho.
Sierra pea is fairly disease-resistant and typically not prone to illnesses. Still, it can be affected by pests and diseases present in its environment. These problems are generally mild. Regarding care, the plant needs moderate maintenance. It should be pruned regularly to keep a good appearance and healthy growth. Fertilizing can also encourage flowering. Sierra pea is well suited for anyone with an outdoor area, like a garden or patio, and does not demand extensive care experience. It may need more attention if grown indoors.
How to keep Lathyrus Nevadensis.
Light
Sierra pea is a sun-loving perennial herbaceous species that originates in open habitats and commonly thrives in meadows and grasslands. It prefers full sun but can also tolerate partial sun.
Water
The Sierra pea thrives in environments with moderate moisture and benefits from consistent weekly watering. It uses water efficiently to support steady growth and does best in gardens that mimic the rainfall patterns of its native climate. This makes it a resilient choice well-suited for outdoor cultivation.
Fertilizer
Usually one fertilizer application in spring is enough for Sierra pea, though repeated feedings can help maximize growth. Fertilize every month to every month and a half. Feeding improves the leaves’ appearance and function, maintaining even color and a healthy texture. It also promotes root development and enhances nutrient uptake for long-term plant health.
Pruning
The Sierra pea is a robust perennial known for its attractive flowers. Prune it in early spring to remove dead stems and shape the plant, which improves airflow and prevents overcrowding. Regular pruning after the flowering period promotes plant health, encourages bushier growth, and stimulates more blooms, enhancing both its appearance and seasonal development.
Botanical profile.
Other names.
Reader questions.
How should I water my Sierra pea plant?
To properly water the Sierra pea plant, it is recommended to use filtered water at room temperature. Tap water may contain harmful particles, so filtered water is preferred. The water should be at room temperature or slightly warmer since the Sierra pea is accustomed to warm conditions and cold water can be a shock to the plant's system. It is advised to avoid overhead watering as it can cause problems with the foliage. Instead, gently apply the filtered room temperature water to the soil until it is fully soaked. This is beneficial for the plant as it keeps the roots moist and allows them to spread and gather nutrients from the soil.
What are the sun requirements for Sierra pea?
Sierra pea, botanically known as Lathyrus nevadensis, is a perennial herbaceous plant that loves sunlight. It thrives best in full sun conditions, which means it needs more than 6 hours of sunlight daily, but it can also tolerate partial sun, receiving about 3-6 hours of sunlight. It's important to observe the movement of sunlight through your garden to find spots that offer the ideal balance for your plants, ensuring they stay healthy and happy.
What should I do if I give my Sierra pea plant too much or too little water?
Overwatering is a more common issue that can harm your Sierra pea plant. When the plant receives too much water, its stems and leaves may wilt and turn yellow. Overwatering can also cause diseases like root rot, mold, and mildew, which can be fatal. Underwatering is less common because the Sierra pea has good drought tolerance. However, it can still happen, causing brittle and brown leaves. It's important to notice signs of overwatering early, as some diseases may not be reversible if you wait too long. If you see early signs, reduce your watering schedule and check the soil's drainage. If it drains poorly, replace it with a well-draining potting mix. If you notice signs of underwatering, simply increase your watering until the signs disappear.
How do you compensate for insufficient natural light indoors?
When natural sunlight is insufficient, especially during winter or in less sunny areas, artificial light becomes essential for the growth of indoor plants. LED lights are recommended for their ability to be customized to specific wavelengths needed by plants. For full sun plants, 30-50W per square foot of artificial light is necessary, whereas partial sun plants require 20-30W per square foot. The light source should be placed 12-36 inches above the plant, imitating natural sunlight exposure, with most plants needing 8-12 hours of light per day.
How often do I need to water my Sierra pea plant?
If your Sierra pea plant is in a pot, you can easily check if it needs watering by sticking your finger into the soil. If the top two to three inches of soil feel dry, it's time to water it. If you have your Sierra pea planted outside in the ground, you can use the same method to test the soil. When the top few inches of soil are dry, it's time to water. Typically, during spring and early fall, watering once a week is sufficient. However, during hot weather, you may need to water twice a week or even more. It's worth noting that mature and well-established Sierra pea plants can tolerate drought quite well.
What are the signs of light deficiency in Sierra pea?
Sierra pea shows several symptoms when suffering from inadequate lighting, including smaller new leaves, leggy or sparse growth, faster leaf drop, slower or halted growth, and lighter-colored new leaves. Additional issues could be chlorosis, where leaves lose their green color, sunscald from intense sunlight exposure, leaf curling as a protection against excessive light, wilting due to loss of water, and leaf scorching characterized by dry and crispy leaf edges.
How much water does my Sierra pea plant require?
To water your Sierra pea plant, don't hold back on the amount of water you give it. Make sure the first two to three inches of soil are dry, and then give the plant a thorough watering. The idea is to saturate the soil completely until excess water flows out through the drainage holes at the bottom of the pot. If you don't see any excess water draining, you may have not given enough water. However, be careful not to let the water accumulate in the soil, as this can harm the plant. Additionally, if the water doesn't drain through the pot, it may indicate that the soil doesn't drain well, which is bad for the plant's health. If the plant is outdoors, receiving 1 inch of rain per week will be enough.
How can you address Sierra pea's light deficiency symptoms?
To combat light deficiency, gradually move the plants to sunnier locations until they receive at least 6 hours of direct sunlight daily. If moving a plant is not feasible, consider using artificial lighting, keeping lamps on for a minimum of 8 hours a day. For outdoor plants, it's crucial to adapt them gradually to prevent sunburn. Minimize obstructions to sunlight by pruning trees or bushes and transplant smaller plants to sunnier locations during their dormant period, ensuring they have ample sunlight and good drainage.
How do I water my Sierra pea plant as it grows?
The water needs of the Sierra pea can vary depending on its growth stages. In the early years or after transplanting, it requires more water to support root development and future growth. As the plant matures, it will need less water. Additionally, during the bloom period, the Sierra pea may need extra water to support flower development.
How should I give water to my Sierra pea depending on the time of year?
The Sierra pea has different water needs depending on the season. In the hottest months of the year, it will need the most water. During this time, you may need to water the plant more than once a week if the soil dries out quickly. On the other hand, during winter, the plant enters a dormant phase and requires less water. In fact, you may not need to water it at all during this season. If you do choose to water it in winter, it should be done no more than once a month to avoid the risk of disease.
What's the difference between watering my Sierra pea plant inside and outside?
For gardeners who do not live in temperate or tropical regions, growing the Sierra pea indoors is the most common option. It's important to note that soil in a container can dry out faster compared to ground soil. Additionally, if there are drying elements like air conditioning units, the Sierra pea may need more frequent watering when planted outside. However, if you receive regular rainfall, you may not need to water your Sierra pea much at all. On the other hand, if you choose to grow this plant indoors, you'll need to water it more often as there won't be an option for rainwater to soak the soil.
