How Much Space Do Brussel Sprouts Need to Grow? A Quick Gardening Guide

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Brussels sprouts are a delicious and nutritious vegetable that can be grown in your own garden. These plants, known for their unique appearance and earthy flavor, need proper care and adequate space to thrive. Understanding the ideal spacing for Brussels sprouts can make a difference in your garden’s yield and the health of the plants.

While Brussels sprouts can adapt to various conditions, they require a significant amount of room to grow. To achieve a successful harvest, it’s important to space the plants accordingly. Large plants need about 18 to 24 inches apart in a row or bed, and if planted in rows, they should be spaced 30 inches apart (source). This wide spacing is crucial to ensure your plants have access to plenty of light and air, which helps to promote healthy growth and development (source).

Understanding Brussel Sprouts

Plant Characteristics

Brussel sprouts are unique plants that belong to the Brassica family, which also includes cabbage, broccoli, and cauliflower. They grow on a central thick stem, producing small, rounded sprouts along the stem. Brussel sprouts thrive in cooler weather and often have improved flavor after exposure to a light frost.

These plants require a growing season of 80 days or more, making it crucial to plant them approximately four months prior to your area’s projected first fall frost date (The Spruce). When determining the amount of space needed for growth, it is recommended to allow about 5 square feet per plant. For example, if you want to grow 10 brussel sprouts, you should allocate around 50 square feet of your garden space for them (Growers Planet).


There are several varieties of brussel sprouts, each exhibiting specific characteristics that cater to different preferences and growing conditions. Some popular varieties include:

  • Long Island Improved: A classic variety with a medium size and excellent flavor
  • Redarling: A red variety with a slightly sweeter taste
  • Churchill: An early maturing hybrid that produces high yields
  • Jade Cross: A hybrid that is disease-resistant and produces uniform, tightly-packed sprouts

When selecting the type of brussel sprouts to grow, consider the specific growing requirements and characteristics of each variety, as well as your personal preferences for taste and appearance.

Section 3: Spacing Requirements

Seed Spacing

When planting Brussels sprouts, it’s essential to give them adequate space to grow and thrive. Sow seeds about ½ inch deep to ensure a strong start for your sprouts. Direct-sow the seeds outdoors, positioning them approximately 2 to 3 inches apart, which allows for proper root development and growth. Once the seedlings emerge, you’ll need to thin them to ensure their healthy growth. Thin seedlings to between 12 to 24 inches apart, as this will give the plants access to essential nutrients, water, and sunlight. (source)

Row Spacing

Equally essential as seed spacing is row spacing. Brussels sprouts require a lot of room to spread out and grow in rows, and proper row spacing contributes to their health and growth. Brussels sprouts need around 18-24 inches of space between each plant in the row, which allows them enough room for proper light and air circulation. (Bonnie Plants)

For optimal results and to help prevent diseases or overcrowding, it is recommended that the distance between rows be around 75cm (30 inches). This wide spacing results in healthier crops with sufficient light, air, and nutrients for optimal growth. (RHS Vegetables)

In summary, adequate spacing is crucial when growing Brussels sprouts. By following the suggested seed and row spacing guidelines, your Brussels sprouts will have a higher chance of thriving and producing a bountiful harvest.

Section 4: Factors Affecting Growth Space

Growing Conditions

Brussels sprouts require specific conditions to thrive and reach their full potential. They need a growing season of at least 80 days or more and improve in flavor after being subjected to a light frost. Adequate sunlight, well-drained soil, and consistent watering are also essential for optimal growth.

When planting Brussels sprouts, it’s vital to space them correctly to avoid overcrowding and promote healthy development. In general, it’s recommended to have at least 18 inches of space per plant, with rows being 24-40 inches apart. This ensures proper air circulation and makes it easier to care for the plants as they grow.

Companion Plants

Choosing suitable companion plants to be grown alongside Brussels sprouts can have a significant impact on their growth space requirements. Some plants may help deter pests, improve soil nutrients, or assist with overall growth.

  • Fast growing crops: Brussels sprouts can be interplanted with faster-growing crops, which can be harvested before the sprouts require more space. This approach not only optimizes your gardening area but also promotes efficient use of resources (Portland Nursery).
  • Beneficial companions: Herbs such as dill, sage, and thyme are often recommended as companion plants for Brussels sprouts. These aromatic herbs help to deter pests that can negatively affect the growth and development of the plants.
  • Spacing considerations: When planting companion plants, make sure not to compromise the needed space for Brussels sprouts. The 18-24 inch spacing rule should still apply, especially when incorporating companion plants that also need room to grow.

Stages of Growth

Transplanting Seedlings

When growing Brussels sprouts, one of the initial stages is transplanting seedlings. To begin, sow seeds around half an inch deep and 3 inches apart (The Spruce). After the seedlings have grown a bit, thin them out to maintain a distance of 18 to 24 inches apart (MiracleGro). This spacing allows each plant to receive enough sunlight and nutrients for healthy growth.


As the Brussels sprouts continue to grow, they will enter the maturation stage. This stage can last 80 to 100 days, depending on the variety (Home Guides). During this time, it is essential to provide the plants with steady, consistent moisture (MiracleGro). You can also consider:

  • Adding mulch around the plants to help conserve moisture
  • Fertilizing as needed to ensure proper nutrients are available
  • Monitoring for pests and diseases to avoid any issues affecting the crop

Once the maturation stage is complete, you will be ready to harvest your delicious Brussels sprouts.

Common Mistakes to Avoid


One of the most common mistakes when growing Brussels sprouts is overcrowding the plants. These vegetables need ample space to spread out and ensure proper growth. To provide the ideal growing conditions, space your plants 18-24 inches apart, depending on their size. This spacing will allow them to receive enough sunlight, which should be at least 6 hours per day, and prevent the plants from competing for resources in the soil.

It’s crucial to maintain this spacing both when starting seeds and transplanting them to the final growing location. Overcrowding can lead to stunted growth, reduced yield, and increased susceptibility to diseases and pests.

Inappropriate Soil

Another common mistake is planting your Brussels sprouts in the wrong type of soil. This vegetable thrives in fertile, well-drained soil, which allows the plant to receive the proper nutrients it needs for healthy growth. Brussels sprouts plants require soil with a pH between 6.0 and 7.0. You can test this by purchasing a pH test kit online, at a nursery, or at your local garden supply store

If your soil doesn’t meet the proper requirements, you can gradually improve its quality by adding a mix of organic compost and aged manure. This will provide the necessary nutrients for your plants, helping them grow strong and healthy. Be sure to also regularly water your Brussels sprouts, keeping the soil consistently moist but not overly saturated. This prevents the plants from wilting and reduces the risk of diseases and pests.


In summary, when it comes to growing Brussel sprouts, providing ample space is essential for their development and overall health. It is advised to plant Brussel sprouts 25 to 35 inches apart, as this allows them to grow efficiently and produce a good harvest.

Moreover, it’s worth noting that each Brussel sprout plant requires roughly 5 square feet of space. Therefore, if you intend to grow multiple plants, make sure to allocate the appropriate area in your garden or container.

Remember, Brussel sprouts thrive in cooler temperatures and can take around 90-100 days to mature before they are ready for harvest. By giving your Brussel sprouts the ideal amount of space and proper care, you can enjoy this nutritious and delicious vegetable fresh from your own garden.