Why You'll Love It
Nasturtiums are beloved by gardeners and plant enthusiasts alike for their vibrant colors, edible flowers and leaves, and ease of care. These cheerful plants offer a dazzling display of blooms in shades of orange, yellow, red, and cream, adding a splash of color to any garden or container. Beyond their beauty, Nasturtiums attract pollinators like bees and butterflies, making them a valuable addition to any ecosystem.
Their peppery flavor makes them a unique culinary ingredient, perfect for salads, garnishes, or even infused oils. Whether you're a seasoned gardener or a beginner, Nasturtiums are a rewarding choice that brings both beauty and functionality to your space. Their ability to thrive in less-than-perfect conditions makes them a resilient and forgiving plant, perfect for adding a touch of whimsy and color to your life.
The Story
Nasturtiums, scientifically known as Tropaeolum, originated in the Andes Mountains of South America, specifically in Peru and Bolivia. These plants thrived in the cool, moist environments of the highlands. The Spanish explorers brought Nasturtiums to Europe in the 16th century, where they quickly gained popularity for their ornamental value and unique flavor.
The name "Nasturtium" comes from the Latin word "nasus tortus," meaning "twisted nose," referring to the peppery, pungent aroma of the plant. In traditional medicine, Nasturtium has been used for its antibacterial and antiseptic properties. Culturally, Nasturtiums are often associated with patriotism, victory, and conquest, likely due to their bright, bold colors and historical association with Roman soldiers who supposedly consumed them for strength. Today, they are cultivated worldwide for their culinary and ornamental appeal.
Complete Care Guide
Nasturtiums are relatively easy to care for, making them a great choice for beginner gardeners. They thrive in full sun to partial shade, requiring at least 6 hours of sunlight per day for optimal blooming. Water regularly, allowing the soil to dry slightly between waterings; avoid overwatering, which can lead to root rot.
Fertilize sparingly with a balanced fertilizer, or one lower in nitrogen, as excessive nitrogen can promote foliage growth at the expense of flowers. Deadhead spent blooms to encourage continuous flowering. Nasturtiums prefer well-draining soil; a sandy or loamy mix is ideal. They can be grown in containers or directly in the garden. Provide support for climbing varieties. Monitor for pests such as aphids and treat as needed. Regular pruning can help maintain shape and prevent legginess.
Light Requirements
Nasturtiums thrive best in full sun, requiring at least 6 hours of direct sunlight each day for abundant flowering. While they can tolerate partial shade, reduced sunlight can lead to fewer blooms and leggy growth. In hotter climates, providing some afternoon shade can prevent leaf scorch.
When growing Nasturtiums indoors, place them near a sunny window, ideally one facing south or west. If natural light is insufficient, supplement with grow lights to ensure they receive adequate illumination. Rotate the plants regularly to ensure even light exposure on all sides, promoting balanced growth. Insufficient light can result in weak stems and pale foliage.
Seasonal Care
Spring
In spring, sow Nasturtium seeds directly into the garden or containers after the last frost. Provide ample sunlight and water regularly. Fertilize with a balanced fertilizer to encourage healthy growth. Monitor for pests and diseases.
Summer
During summer, ensure Nasturtiums receive adequate sunlight and water. Deadhead spent flowers regularly to promote continuous blooming. Provide shade during the hottest part of the day to prevent leaf scorch. Fertilize every 2-3 weeks with a bloom-boosting fertilizer.
Fall
In fall, allow Nasturtiums to self-seed if desired. Reduce watering and fertilization. Collect seeds for planting the following season. Prune back any leggy or overgrown stems.
Winter
Nasturtiums are typically treated as annuals in colder climates. In milder climates, they may survive the winter with reduced watering. Alternatively, bring container-grown plants indoors to overwinter in a bright, cool location.
The Life of Your Nasturtium
Seedling / Juvenile
During the seedling stage, provide consistent moisture without overwatering. Ensure young plants receive bright, indirect light. Use a well-draining potting mix to prevent damping-off. Begin fertilizing with a diluted, balanced fertilizer once seedlings have developed a few sets of true leaves.
Adolescent
As Nasturtiums mature, gradually increase sunlight exposure. Continue to water regularly, allowing the soil surface to dry slightly between waterings. Pinch back the tips of stems to encourage bushier growth and more abundant flowering. Monitor for pests and diseases.
Mature
During the blooming period, deadhead spent flowers regularly to encourage continuous flowering. Provide consistent moisture and fertilize every 2-3 weeks with a bloom-boosting fertilizer. Ensure plants receive adequate sunlight. Support climbing varieties with trellises or stakes.
Established
After the blooming season, reduce watering and fertilization. Allow the plants to self-seed if desired. Alternatively, collect seeds for planting the following season. Prune back any leggy or overgrown stems. In colder climates, treat as annuals or bring indoors if grown in containers.
Propagation Guide
Nasturtiums are easily propagated from seeds or stem cuttings. To propagate from seeds, sow seeds directly into the garden or containers in spring after the last frost. Alternatively, start seeds indoors 4-6 weeks before the last frost. Soak seeds in water overnight to improve germination.
For stem cuttings, take 4-6 inch cuttings from healthy stems. Remove the lower leaves and place the cuttings in water or moist potting mix. Roots should develop within a few weeks. Once roots have formed, transplant the cuttings into individual pots. Division is not applicable for Nasturtiums. Keiki propagation is not applicable for Nasturtiums.
Expert Knowledge
To encourage bushier growth and more abundant flowering, pinch back the tips of stems regularly. Avoid over-fertilizing, as excessive nitrogen can promote foliage growth at the expense of flowers. Companion plant Nasturtiums with vegetables like tomatoes and cucumbers to deter pests. Use Nasturtium flowers and leaves in salads, garnishes, or infused oils for a unique peppery flavor.
Nasturtiums are allelopathic, meaning they can inhibit the growth of other plants nearby. Consider this when choosing companion plants. Different varieties of Nasturtiums have different growth habits, so choose varieties that are suitable for your space and growing conditions.
Troubleshooting
Yellow leaves
Yellow leaves can indicate overwatering, nutrient deficiency, or pest infestation. Allow the soil to dry out slightly between waterings. Fertilize with a balanced fertilizer. Inspect for pests such as aphids and treat accordingly.
Brown leaf edges
Brown leaf edges often indicate underwatering, low humidity, or fertilizer burn. Increase watering frequency, especially during hot weather. Increase humidity by misting or using a humidifier. Flush the soil with water to remove excess fertilizer salts.
Drooping leaves
Drooping can be caused by underwatering, overwatering, or extreme heat. Check soil moisture and adjust watering accordingly. Provide shade during the hottest part of the day. Ensure the soil is well-draining to prevent root rot.
Root rot
Root rot is caused by overwatering and poor drainage. Improve drainage by using a well-draining potting mix and ensuring pots have drainage holes. Allow the soil to dry out significantly between waterings. Remove affected roots and repot in fresh soil.
Pests
Nasturtiums can be susceptible to aphids, spider mites, and whiteflies. Inspect plants regularly and treat infestations promptly with insecticidal soap or neem oil. Encourage beneficial insects like ladybugs to control pests naturally.
Frequently Asked Questions
What are the ideal light conditions?
Nasturtiums need at least 6 hours of direct sunlight daily for optimal blooming.
How often should I water?
Water Nasturtiums when the top inch of soil feels dry. Avoid overwatering.
When should I repot?
Repot Nasturtiums if they become root-bound or if the soil is depleted. Use a well-draining potting mix.
Is it toxic to pets?
Nasturtiums are generally considered non-toxic to pets and children.
How big will it grow?
Nasturtiums can grow from 1 to 10 feet tall, depending on the variety and growing conditions.
Can I propagate at home?
Yes, Nasturtiums can be easily propagated from seeds or stem cuttings.
