How to Stop Broccoli from Bolting: A Guide to Flowering Broccoli

Broccoli is an easy-to-grow vegetable that can be grown in almost any environment. However, if you live in a hot, humid climate, you may find that your broccoli may have started to prematurely bolt. How to stop broccoli from bolting?

When a plant bolts, it means that it is about to seed. The plant’s stem will begin to grow taller and thinner, and the leaves will start to yellow.

Once a plant has bolted, it will no longer produce edible heads of broccoli. For some plants, flowering might mean a good thing, but for broccoli, it signals the end of the harvest. Let’s look at how to stop broccoli from bolting.

Your Broccoli Started to Flower: What This Means

Broccoli is a nutritional powerhouse – packed with vitamins, minerals, and antioxidants? Is it still safe to eat? What’s going to happen now? Technically speaking, broccoli flowering or bolting isn’t harmful to humans. The plant is just doing what it’s supposed to do: reproduce.

For gardeners, however, flowering broccoli can be a sign of trouble. If the weather is too warm, or if the plant is stressed, it may start to bolt prematurely.

When this happens, the stem of the plant will become thin and spindly, and the leaves will turn yellow. The plant will no longer produce edible heads of broccoli, and it will eventually die.

How Can You Prevent Broccoli from Bolting?

How to Stop Broccoli from Bolting

If you want to enjoy a bountiful harvest of broccoli, it is vital to take steps to prevent your plants from prematurely bolting. Bolting is when a plant produces flowers and goes to seed instead of continuing to produce fruit or vegetables.

It’s a common problem with broccoli, and it’s often triggered by warm weather or long days. There are a few things you can do to try to prevent your broccoli from bolting, including:

Planting in Cooler Weather

How to Stop Broccoli from Bolting

Broccoli is a cool-weather crop, so it thrives when temperatures are between 60 and 65 degrees Fahrenheit. You may like to plant broccoli as part of a fall garden.

Broccoli thrives best in USDA hardiness zones 6-8. If you live outside these zones, it’s best to wait until the weather has cooled down before planting your broccoli seeds.

If you live in areas where the weather is slightly warmer, you can also try to plant your broccoli in the fall instead of the spring.

However, you will need to start your seeds indoors about 8-10 weeks before the last frost date. You can also try planting broccoli in shady areas. This can help to keep the plants cooler and prevent them from bolting.


Mulching your broccoli plants can help keep the roots cool and prevent bolting. Use a layer of straw, leaves, or grass clippings about 2-3 inches thick.

Be sure to keep the mulch away from the stems of the plants so that they don’t rot. Mulching will also help to keep the soil moist, which is important for broccoli plants.


A properly hydrated plant has fewer chances to bolt. For broccoli, that means giving it about an inch of water per week.

The best way to know if your broccoli is getting enough water is to stick your finger in the soil. If it feels dry several inches below the surface, it’s time to water.

You can also use a garden hose with a spray nozzle attachment to give your plants a good soaking. Be sure to water at the base of the plant rather than from overhead.

This will help reduce the chances of pests and disease and prevent water from evaporating before it has an opportunity to reach the roots.

Focusing on the soil rather than the plant is the best way to water. The water should be able to penetrate the soil and reach the plant’s roots. If it can’t, the plant will suffer and may eventually bolt.


An adequately fertilized plant is a healthy plant, which is much less likely to bolt. By fertilizing your broccoli regularly, you can ensure that it gets the nutrients it needs to stay strong and vigorous.

There are a few different ways to fertilize broccoli, but one of the simplest is to topdress the soil with compost or manure before planting.

You can also side-dress the plants with compost or manure once they’ve started to grow. Another option is to use a liquid fertilizer, such as fish emulsion or kelp extract.

All of these methods will help to ensure that your broccoli plants are getting the nutrients they need to stay healthy and prevent bolting.

Cutting Off Flowers

If you see that your broccoli plants are starting to produce flowers, cut them off as soon as possible. This will signal to the plant that it needs to produce more broccoli rather than going to seed.

It’s also a good idea to remove any yellowing leaves from the plant. These leaves are no longer photosynthesizing, so they’re not doing the plant any good. Removing them will also help to prevent disease and improve air circulation.

Thinning Out Plants

They may bolt if you have too many broccoli plants growing close together. Crowded plants will compete for resources, and the weaker ones will be more likely to bolt.

To prevent this from happening, thin out your plants so that they’re spaced about 18 inches apart. This will give them room to grow and will help to improve air circulation.

Can You Still Eat Broccoli When It Starts to Flower?

When most people think of broccoli, they picture dense green heads of florets. However, if left to mature, broccoli will produce small yellow flowers. While some gardeners view this as a sign that the plant has gone to seed, the truth is that you can still enjoy broccoli even after it starts to flower.

Even the bright yellow broccoli flowers are edible – and some people find them to be quite delicious. However, bear in mind that its taste isn’t for everyone’s palate. Some people have reported that the flowers have a slightly bitter taste.

If you do decide to give broccoli flowers a try, you can eat them raw or cooked. They can be added to salads, used as a garnish, or stir-fried. You can also pickle the flowers to enjoy later on.

Will Broccoli Grow After It Flowers or Bolts?

Once broccoli flowers or bolts, it’s done growing. The plant will put all of its energy into producing seeds rather than broccoli. For this reason, it’s best to harvest the broccoli before it reaches this point. If you do let it go to seed, you can save the seeds to grow more broccoli next year.

How to Stop Broccoli from Bolting: Final Thoughts

It’s never fun to see your broccoli plants bolt, but it doesn’t have to be the end of the world. By taking some preventative measures, you can stop broccoli from bolting.

Watering, fertilizing, and thinning out plants are all good ways to keep them healthy and prevent bolting. Don’t forget about the ideal growing temperature, either. If it gets too hot, your plants may start to flower.

If you see that your broccoli is starting to bolt, there’s no need to panic. You can still enjoy the plant – even after it flowers. The small yellow flowers are edible and can be added to salads or stir-fries. Just bear in mind that not everyone enjoys their taste

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