Propagation Essentials: Growing Sweet Alyssum (Lobularia maritima) in a Seed Starting Tray

Propagation Essentials: Growing Sweet Alyssum (Lobularia maritima) in a Seed Starting Tray

Are you looking to add some sweet alyssum (Lobularia maritima) to your garden? One of the best ways to start growing these beautiful flowers is by using a seed starting tray. In this article, we will cover all the essential tips and tricks for successfully propagating sweet alyssum in a seed starting tray. Whether you are a beginner or an experienced gardener, this guide will help you achieve the best results and enjoy the beauty of sweet alyssum in your garden.

Overview of Sweet Alyssum (Lobularia maritima)

Sweet Alyssum, also known as Lobularia maritima, is a popular flowering plant that is commonly grown for its delicate clusters of small, fragrant flowers. It is a low-growing annual plant that is native to the Mediterranean region. Sweet Alyssum is known for its easy cultivation and ability to attract beneficial insects to the garden.

Description of Sweet Alyssum

Sweet Alyssum plants typically grow to a height of 6-12 inches and spread up to 12 inches wide. The flowers come in a variety of colors including white, pink, and purple. The blooms have a sweet, honey-like fragrance that attracts bees, butterflies, and other pollinators to the garden. Sweet Alyssum is often used as a ground cover or in containers and hanging baskets.

Benefits of Growing Sweet Alyssum

There are several benefits to growing Sweet Alyssum in the garden. Aside from its attractive appearance and sweet fragrance, Sweet Alyssum is also known for its ability to help repel pests such as aphids and spider mites. Additionally, the flowers provide a valuable food source for pollinators, helping to support a healthy ecosystem in the garden.

Varieties of Sweet Alyssum

There are several varieties of Sweet Alyssum to choose from, each with its own unique characteristics. Some popular varieties include ‘Snow Crystals’, which have white flowers, ‘Carpet of Snow’, which forms a dense mat of white blooms, and ‘Royal Carpet’, which features purple flowers. Whether you prefer a traditional white variety or a more colorful option, there is a Sweet Alyssum variety to suit every garden.

Preparing the Seed Starting Tray

When it comes to growing Sweet Alyssum in a seed starting tray, it’s important to properly prepare the tray to ensure successful propagation. Here are some essential steps to follow:

Selecting the Right Tray

Choose a seed starting tray that is shallow and has drainage holes at the bottom. This will help prevent waterlogging and ensure proper aeration for the young plants. Additionally, opt for a tray that is durable and can be easily cleaned for reuse.

Choosing the Soil Mix

Select a well-draining soil mix that is rich in organic matter. A good mix for growing Sweet Alyssum should contain a blend of peat moss, perlite, and vermiculite. Avoid using heavy garden soil, as it can compact and hinder root growth.

Moistening the Soil

Before sowing the Sweet Alyssum seeds, it’s important to moisten the soil in the seed starting tray. Add water to the soil mix gradually, mixing it well until it reaches a consistency where it holds together when squeezed but is not waterlogged. This will provide the ideal environment for the seeds to germinate and the young plants to grow.

Following these steps will help ensure successful propagation of Sweet Alyssum in a seed starting tray. Happy gardening!

Sowing Sweet Alyssum Seeds

Sweet Alyssum, also known as Lobularia maritima, is a delicate and fragrant annual flower that is easy to grow from seeds. Here are some essential tips for sowing sweet alyssum seeds in a seed starting tray.

Spacing and Depth

When sowing sweet alyssum seeds in a seed starting tray, it is important to space the seeds evenly to allow room for growth. Use a small trowel or your fingers to create shallow furrows in the soil, about 1/4 inch deep. Drop the seeds into the furrows, spacing them about 1 inch apart.

Covering the Seeds

After sowing the sweet alyssum seeds, lightly cover them with a thin layer of soil. This will help protect the seeds and keep them moist during the germination process. Be careful not to bury the seeds too deep, as they may have trouble sprouting if they are covered with too much soil.

Providing Adequate Light

Sweet alyssum seeds require plenty of light to germinate and grow into healthy seedlings. Place the seed starting tray in a sunny location, such as a windowsill or under a grow light. Make sure to rotate the tray regularly to ensure that all sides of the seedlings receive equal amounts of light.

By following these tips for sowing sweet alyssum seeds in a seed starting tray, you can ensure a successful germination process and healthy growth of your sweet alyssum plants.

Caring for Sweet Alyssum Seedlings

When it comes to caring for sweet alyssum seedlings, there are a few key factors to keep in mind to ensure their healthy growth and development.


Proper watering is essential for the growth of sweet alyssum seedlings. It is important to keep the soil consistently moist but not waterlogged. Water the seedlings when the top inch of soil feels dry to the touch. Be sure to water at the base of the plants to avoid wetting the foliage, which can lead to fungal diseases.


Fertilizing is another important aspect of caring for sweet alyssum seedlings. Once the seedlings have developed their first set of true leaves, you can begin fertilizing them with a balanced liquid fertilizer. Be sure to follow the manufacturer’s instructions for dilution and frequency of application. Over-fertilizing can lead to nutrient imbalances and damage to the seedlings.


As sweet alyssum seedlings grow, they will eventually outgrow their seed starting tray and need to be transplanted into larger containers or into the garden. When transplanting, be sure to handle the seedlings gently to avoid damaging their delicate roots. Plant the seedlings at the same depth as they were in the seed starting tray and water thoroughly after transplanting to help them establish in their new environment.

In conclusion, growing sweet alyssum in a seed starting tray is a rewarding and relatively simple process that can yield beautiful and fragrant blooms for your garden. By following the propagation essentials outlined in this article, you can successfully start your sweet alyssum seeds indoors and transplant them outdoors for a stunning display. Remember to provide adequate light, moisture, and warmth for optimal growth, and enjoy the beauty and charm that sweet alyssum brings to your garden landscape.