Square Foot Gardening Broccoli: the best way to grow

Square foot gardening is the best way to grow broccoli. Using the right growing techniques you can grow large broccoli heads with minimal effort. By choosing the right companion plants and precise nutrient-rich soil mix, the broccoli plants will suffer from zero pest damages and weed growth will also be manageable. Even if you are a beginner at gardening, you can cultivate broccoli with ease in a square foot garden setup.

Steps to Grow Broccoli in Square Foot Garden

Step-1: Decide your Grow Space: To begin, construct (or purchase) a 4-by-4-foot raised bed box (lined with weed barrier landscaping fabric if laying on top of other soil).

Step-2: Add Your Preferred Soil: Fill it with a weed-free mix of fertile potting soil (half peat moss, compost, and vermiculite, or another mix of your choosing).

Step-3: Promote Growth: To promote consistent development, grow broccoli in organic, rich soil and fertilize seedlings and early transplants. Too much nitrogen stimulates excessive leaf growth, so use a balanced fertilizer. Bloom formation is aided by potassium and phosphorus.

Step-4: Organize Your Grid: Plant your seeds after overlaying a square foot grid onto your box for plant spacing.

Step-5: Plant Spacing: Broccoli leaves can stretch across 3 feet. Broccoli plants should be spaced 12 to 24 inches (30 to 61 cm) apart. More space between plants supports the growth of larger center heads

Step-6: Seed Depth: Sow seeds in a quality seed-starting mix or soil pellets at a depth of 1/4 to 1/2 inch (6 to 13 mm). Broccoli seeds germinate in 4 to 7 days if the temperature stays between 45 and 85 degrees Fahrenheit (7 to 29 ℃). Broccoli can be direct-seeded into the square foot garden in June for a fall yield.

Step-7: Sunlight Requirement: Broccoli thrives under direct sunlight. Select a garden location that receives at least 6 to 8 hours of direct sunlight per day.

Step-8: Get Growing: Water, grow and get delicious broccoli for lunch.

Square Foot Gardening Broccoli
Square Foot Gardening Broccoli

Read: Companion planting square foot gardening

Broccoli Growing Tips

1. Cool Weather

Broccoli thrives at cooler temperatures. Broccoli cultivated in the cooler months has a sweeter flavor than broccoli grown in the warmer months. Knowing when to plant broccoli, a cool-season plant is crucial.

If you want to harvest broccoli plants in the middle of summer, start them 6 to 8 weeks before the latest frost date in square foot gardening.

2. Growth Environment

If you’re growing broccoli seedlings in a shady spot, make sure to give them enough light to keep them from getting leggy. If the seedlings develop lengthy stems, repot them deeper (up to the first leaves) and then supply more light.

Before planting spring seedlings in the garden, wait until the weather is frost-free. Make sure to harden off broccoli seedlings by gradually exposing them to direct sunshine and wind.. 

3. Other Requirements

Because broccoli grows best in damp, but not soggy soil, water it frequently. Use mulch to keep weeds at bay and soil moisture levels stable. It’s ideal to plant broccoli in an area of the garden where you haven’t planted Brassicaceae (cabbage family) crops in four years to avoid disease and pests. Row covers help protect transplants from cold weather and pests.

Read: Square Foot Gardening Tomatoes (7 Ultimate Tips)

How to Effectively Harvest Broccoli Plants

The unopened bloom of the broccoli plant is the part that can be eaten. Harvest the center head when it’s fully matured but before the individual buds emerge into little yellow flowers.

A 4- to 7-inch (10 to 18-cm) tight head with large, packed blossom buds is a sign that broccoli is ready to harvest. Harvest as soon as the buds begin to open. It’s too late to harvest a plant that has bolted (flowered).


Fresh-picked broccoli heads should be harvested in the cool morning hours and refrigerated as soon as possible to protect their quality. Broccoli heads that have not been washed can be kept in the refrigerator for 3 to 5 days. Broccoli that has been blanched freezes well and retains its quality for up to a year.

Square Foot Garden Broccoli
Square Foot Garden Broccoli

Things You Need to Know Before Growing Broccoli 

Cultivation TimeBecause spring temperatures can be inconsistent, broccoli grows best in the fall. Young saplings, for example, produce small, early heads as a result of long, chilly springs.
Ideal TemperatureHeat-stressed broccoli opens its flower buds prematurely if temperatures rise early in the spring, and high temperatures as broccoli matures can result in bitter, loose heads with smaller and less delicious florets.
pH of SoilBroccoli thrives in full sun, fertile, well-drained soil that is consistently moist and rich in organic matter. Soil has to be slightly acidic (pH between 6.0 and 6.8).
Essential NutrientsThe correct pH and organic matter ensure that nutrients, especially critical micronutrients like boron, are easily accessible. Broccoli with hollow stems can be caused by a boron deficit, however, too much boron is hazardous to plants, so a soil test is required.
Fertilizer NeededBroccoli is a relatively heavy feeder, so before planting, mix in 2 to 4 inches of rich compost or a thin layer of well-aged manure. Rabbit manure is an excellent option. However, any aged manure or compost will create large, delicious heads.
Freezing TemperaturesFreezing temperatures can produce chilling injury, which causes buds to become purple and heads to soften, however, they are still edible. Just make sure your heads don’t freeze and thaw many times.
Cold Weather ProtectionProvide cold-weather protection with floating row coverings, which give 4 to 8 degrees of warmth to the crop, protecting it from hard freezes and prolonging the season by up to four weeks. Tunnels or a cold frame can also be used to cover broccoli, increasing daytime temperatures by 10 to 30 degrees.
Best FlavourHarvest broccoli heads when the buds are just beginning to swell but before the yellow petals appear for the finest flavor.
Keep an eye on the head since the individual buds begin to flower when it begins to spread wide.
Cut the stalk at a slant, about five to eight inches below the head, to harvest the middle head. 
Harvest TimeBecause broccoli has a high respiration rate, it’s best to harvest it early in the morning before the plants heat up. Once the heat has built up, you must immediately cool it down or it will not hold up and taste as it should.
Post HarvestAfter you’ve harvested a plant’s center head, scratch a little nitrogen-rich fertilizer like fish meal or aged manure into the soil around its base to encourage longer side-shoot development.

Read: Square Foot Gardening Pole Beans

Broccoli Varieties to Try

Choose a kind that will develop before the hot season arrives that is most suited to your climate. Broccoli is grown in the late fall and winter months in warm climates like Arizona.

For example, plant broccoli seeds outside in the low desert of Arizona from late August to December, and broccoli transplants from October to January. Broccoli requires at least 6 hours of sunlight, despite its preference for lower temperatures.

  • Green Goliath: It thrives in hotter climates and produces side branches. 
  • DeCicco: It is a small cultivar with a lot of side branches. 
  • Calabrese: It is a popular Italian cultivar with a lot of side shoots. 
  • Rapini and purple varieties are also available for novelty.

Harvest Season for Different Varieties

Broccoli harvest season is also determined by the type you choose. ‘Green Goliath’ is a heat-tolerant, fast-growing broccoli cultivar that allows you to harvest broccoli for longer even when the temperature rises. ‘Calabrese’ is a cold-tolerant heirloom variety that produces one primary head followed by many side shoots.

In warmer weather, ‘Calabrese’ broccoli bolts. But it’s a great choice for the fall and winter months.


You’ll want to give your broccoli the finest possible care if you want to get the most out of your investment. Flea beetles, caterpillars, aphids, and root rot are all common concerns that can be handled by crop rotation and adequate pest control, such as row coverings or Bacillus thuringiensis.

To produce high-quality crops, broccoli requires continuous soil moisture. Untreated grass clippings or other organic mulches can help to save moisture while also limiting weed development.

Square Foot Gardening Broccoli tips
Square Foot Gardening Broccoli tips

Read Why do my broccoli leaves turn yellow?

How to Grow Large Broccoli Heads 

Growing large heads requires two things: selecting the appropriate type, and providing ideal growing circumstances. Some varieties have been bred for larger-size heads. 

The broccoli plants require moist fertile soil, plenty of elbow room in the garden, and the ability to grow swiftly in order to reach their full potential. Any setbacks, such as dry soil when they are young, can cause them to be stunted for the rest of their lives.

Spacing is Important

Also, keep in mind that robust broccoli plants can develop leaves that span 3 feet from one side of the plant to the other. Keep this in mind when deciding how far apart to space your plants in your garden.

Choose the Right Companions

Keep other plants at least 18 inches away from each of your broccoli plants if you wish to mix multiple types of plants in one bed, and be aware that huge broccoli plants will shade neighboring smaller ones.

Read: Square Foot Gardening Spinach

Should You Pull Out Broccoli Plants After Cutting the Head?

You certainly can. If you leave them in the ground, you’ll be able to pick “mini-heads” of broccoli that will grow to be about the size of a half head. You can even rip them out now and start a fresh plant in their place. Either way is good; it is simply a matter of personal preference.

Dos and Don’ts of Broccoli Square Foot Gardening


  • Try it at Your Pace: Give it a shot. Square foot gardening is simple, inexpensive, and effective — you have nothing to lose, and it might be the start of a new self-sufficiency path. 
  • Companion plant: Putting the proper plant in the right position can keep pests away and provide you with abundant, well-pollinated crops. Natural alternatives are vastly superior to hazardous chemicals. 
  • Grow Rare Plants: Grow exotic varieties of broccoli that are difficult to find in stores.
  • Keep an Eye on Plants: Place your frames in a prominent location where you will see them every day. You’ll be able to tell if your crops need to be harvested, watered, or protected from an unpleasant pest.
  • Compost:  Old garden clippings, vegetable peel, grass clippings, shredded cardboard, tea bags, and coffee granules can all be used to make your own garden compost. It will be ready to use after a year, and it is the best food you can give your crops.


  • Don’t go overboard: If you’re new to gardening, don’t take on too much at once; start with one 16-foot frame and expand later. 
  • Don’t Use peat moss or synthetic fertilizers: Consider the environment’s sustainability and your carbon impact. It’s great if you can avoid using peat. 
  • Don’t Choose Fragile Crops:  If you live in northern areas of the world, avoid trying to grow tender crops such as courgettes and tomatoes outside – they do far better in a polytunnel or greenhouse. Choose tough crops like kale, onions, carrots, and broccoli.
  • Avoid Mint: Plant mint straight in your square foot bed; it will quickly take over the entire area. To keep mint contained, grow it in a pot and sink the entire pot into your square foot space. 
  • Don’t Neglect Climbers: Climbing plants are often overlooked. Most climbers will require assistance in finding their way to the resources you’ve set up for them. They can’t climb up a wall or fence; they’ll require a trellis or some netting. Make a link to assist them in their growth.
How to do Broccoli Square Foot Gardening
How to do Broccoli Square Foot Gardening

The Pros of Square Foot Broccoli Gardening 

  • Increased produce: Because intensive planting allows you to get a lot of produce from a little area, it’s great for gardeners with limited space. The system’s organized character also makes it easy to remain on top of things and plan ahead for the entire gardening year. To safeguard your plants, cover the little beds with cloches, cages, or cold frames.
  • Quick set-up: Square foot gardening is a terrific approach for first-timers because it’s a simple way to start a new garden. You can put your raised bed almost anywhere, including on grass or tarmac, and you can build, fill, and plant it in just a few hours! Even if you work in your current soil, you just need to prepare the planting sites, not the paths, so it takes much less time and effort.
  • Minimal regular maintenance: Because the garden is small and you only have a few specified activities to complete each day, you only need to spend a few minutes at a time planting, maintaining, and harvesting. Square foot gardening’s clean, raised beds make it easier to garden if you’re over the age of 50 or have mobility issues. 
  • Less weeding: A square foot garden filled with the soilless mix will have few (if any) seeds in it. It depends on the compost you use and thus no weeds to pick for the first season. Weeds, on the other hand, will become more numerous as seeds blow or fall into the bed. 
  • More Variety: Companion planting is the practice of growing a range of crops close together to boost biodiversity and lessen the threat of pests and disease.
  • Protects Soil: Intensive planting reduces bare soil and functions as a cover crop to protect the vital soil ecology beneath. 
  • Fewer Weeds: Crops that are planted close together also help to reduce the number of weeds that germinate and establish themselves in the square foot gardening of broccoli.

Read: Square Foot Gardening Strawberries

How many broccoli can you plant in a square foot?

To get the best yield plant one broccoli per square foot.

How much space does a broccoli plant need?

Ideally, a broccoli plant grows best when there is at least 18 inches of space between the plants.

What happens if you plant broccoli too close together?

Broccoli plants require a lot of space in the garden to produce the maximum harvest yields. Closer broccoli spacing is an option, but it will diminish the size of the heads your plants produce and lower your overall yields.

If you’re planting numerous rows of broccoli, each row should be at least three feet apart, even if you’re just doing standard gardening.

This is why it’s better to cultivate broccoli in square feet. If you don’t have much area in your yard or any garden space at all, you can grow broccoli in individual plots without fear of overcrowding.

Does broccoli grow back every year?

Broccoli plants can be picked two or three times or for up to three months in general. The plant generates a huge central head first. With 5 to 6 inches of stalk, this head should be trimmed at a gentle angle.

For several weeks after being cut, the plant will grow smaller side heads. Broccoli heads should be picked while they’re small, tight, and firm. It should be clipped as soon as bloom buds emerge. Broccoli becomes bitter when the yellow blooms open.

How much broccoli will one plant yield?

The length of time you can harvest broccoli is mostly determined by the weather. Broccoli is a cool-season crop that bolts or goes to seed when the weather gets too hot and dry. It grows best in Subtropical climates from fall to late April.

It can be picked several times during the cooler months. Your broccoli-picking days are likely to be over once the weather warms up.

How many broccoli can you plant in a square foot
Square Foot Gardening broccoli

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