Best Fertilizer for Brussels Sprouts: Organic, Homemade, Compost, NPK, Liquid, Natural, When and How to Apply

Brussels Sprouts belongs to Cole crops. Brussels Sprouts require a larger amount of fertilizer than other Cole crops. Like all members of the family, Brussels Sprouts are nitrogen hogs and for a successful crop, you would like to feed plants with a nitrogen-rich fertilizer. Brussels Sprouts prefer a greater balance of potassium and phosphorus. Sufficient quantities of boron and calcium levels are also important. Let’s check out the best fertilizer for Brussels Sprouts.

Best Fertilizer for Brussels Sprouts
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When you plant in containers for the first time, you should add either well-rotten manure or compost to the initial burst of nutrients needed to establish plants and encourage faster growth. Good management methods are essential if maximum fertilizer responses are to be met in Brussels sprout production. Crop response from fertilizer cannot always be accurately predicted due to the impact of soil type, weather conditions, and other cultural practices.

Soil testing results, field experience, and knowledge of certain crop requirements help determine the essential nutrients and application rate. The application for fertilizer for Brussels Sprouts should contain insurance of the appropriate level of all nutrients. Maximum fertilization aims to produce high quality and production according to maximum profitability. Grow Brussels Sprouts in well-drained but moisture-free, fertile soil with pH 6 to 7. 

Best fertilizer for Brussels Sprouts

Homemade fertilizers for Brussels Sprouts 

Coffee grounds

The use of manure made from coffee grounds wonders, as it contains nitrogen and all plants need this important nutrient, especially the Broccoli, Cauliflower, Kale, and Brussels Sprouts. You can also add a Coffee ground to the soil for better soil structure. Be aware that stronger Coffee can be significantly more acidic.

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Brussels Sprouts
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Epsom salt

Brussels Sprouts require a lot of fertile soil to grow, as well as high concentrations of nitrogen and some magnesium. Nitrogen can be given to them by adding a handful of Epsom salts per square yard to the soil.


Brussels stakes need calcium; you can add powdered eggshells to the soil around Brussels Sprouts.

Wood ash

Use wood ash alkalinity to improve the soil for Brassicas like Cabbage and Brussels Sprouts. This is a great way to prevent the root of the club, a common disease when the soil is very acidic. 

Compost manure for Brussels Sprouts

Well-rotten manure

Improve your soil by adding well rotten manure or fertilizer in spring or fall. Do not use fresh manure as it can contain harmful bacteria, and weed problems may increase.  Brussels Sprouts need a permanent supply of nitrogen, for which you can use organic fertilizer like composted manure.

Poultry manure

Brussels Sprouts plants are heavy feeders which must be increased uninterrupted. If you have rotten chicken manure, you will find the best fertilizers for your Brussels Sprouts. 


You can use compost or manure tea at the time of Brussels Sprouts bud formation.

Organic fertilizers for Brussels Sprouts

Blood and bone meal

The best fertilizer for the Brassica is blood and bone. Blood and bone contain good amounts of nitrogen, phosphorus, and calcium. Blood food is also good for vegetable gardens with greens like Kale, Brussels Sprouts, and Lettuce.

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Brussels Sprouts
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Cottonseed meal

Brussels Sprouts grow well in soil rich in nitrogen. For Brussels Sprouts, it is better to use nitrogen-rich fertilizers such as blood food, cottonseed meal. Be careful too much nitrogen in the soil will produce a lot of leaves, but sprouts will be minimal.

Natural fertilizers for Brussels Sprouts

Apply organic mulch when the temperature rises above 26°C. Organic mulch such as grass clippings, straw, and chopped newspapers help cool the soil, reduce water pressure, and control weeds.

Liquid fertilizers for Brussels Sprouts 

Compost tea

Supplementing plants with organic fertilizers like compost tea every other week for the first two months goes a long way towards the development of strong roots and stems.  

Seaweed extract

Foliar feed lightly with compost tea or a seaweed extract once or twice a month.

Fish emulsion

Modify the soil with fertilizer or balanced organic fertilizer before planting. When sprouting begins, the fertilizer is fed with liquid kelp or fish emulsion, which is repeated every 2 weeks.

Commercial fertilizers for Brussels Sprouts

Fertilize the ground with fertilizer 5-10-10 before planting at the rate of about 2.3 kg per 100 square feet. A side dressing of nitrogen can be applied at the time of planting and three weeks. Brussels Sprouts also perform well when fed throughout the season with water-solving plant food such as 10-10-10. In general, consuming fertilizer at the beginning of the season and every few weeks can ensure that your Brussels Sprouts have enough nutrients to sustain them throughout the season.

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Brussel Sprouts
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Brussels Sprouts fertilizer schedule

Brussels Sprout plants are classified as heavy feeders due to their rapid vegetative growth. They need to fill soil nutrients frequently to fuel this growth. Feed them twice at least during the growing season. Feed with a high nitrogen fertilizer per month for excellent growth that contains boron. Plants need more boron saplings than other vegetables to prevent hollow stems and small buds. Brussels Sprouts also need more boron than other vegetables.

Boron is a plant nutrient that is used in fine quantities by all plants, without it, Brussels Sprouts produce hollow stems and small buds. If these symptoms have appeared in your plants, you can add boron to the soil by dissolving 1 level tablespoon of borax in 5 quarts of water and spraying it evenly on a 50 square feet bed. Don’t be tempted to mix too much, because it causes too many problems. Also, do not apply unless there are signs of deficiency in your plants that we have just mentioned.

Fertilize before planting and then mid-season, side-dress plants with well-aged compost, or even feed with organic fertilizers such as 5-10-10 or 10-10-10. Heavy rains or sandy soils, supplement the soil with nitrogen-rich manure. Sprinkle 1/2 cup of 21-0-0 fertilizer under each 10-foot row about 6 inches from the plant base. Water after fertilizer so that nutrients seep into the soil.

How to fertilize Brussels Sprouts in pots 

Brussels Sprouts are heavy feeders. You can add well-rotten manure when planting in potting mix and side-dress plants with compost or manure or with balanced fertilizer 3 to 4 weeks after transplanting. Then, when they are grown in half, apply fertilizers like 10-10-10 or 5-10-5 or 5-10-10 as per instructions on the product. Alternatively, you can also feed this vegetable crop with a liquid fertilizer every other week instead of time-based. These plants prefer nitrogen-rich soil. You can side-dress organic fertilizers such as compost or manure.

The manure mixed in water also works well. If you have transplanted the plant into a large vessel, wait 3 weeks after the transplant. Fertilization is not always necessary. If you modify the soil with fertilizer before planting, there must be a lot of nutrients to support the plant as it grows. It said many gardeners like to add fertilizer to help Brussels Sprouts further. While plants are like nitrogen, they can be very harmful. Excess levels of nitrogen will result in more foliage. The plant diverts its energy to grow instead of producing fruit. 

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Brussels Sprouts
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Frequently asked questions about fertilizers for Brussels Sprouts (FAQ)

Why are my Brussels Sprouts not growing on plants?

If your plants are not producing many sprouts, this might be a nitrogen deficiency in your soil.

Why are my Brussels Sprouts so small?

Brussels Sprouts need very fertile soil to do well. The best results, therefore, require a substantial amount of fertilizer one-third before cultivation and two-thirds after planting.

Why are my Brussels Sprouts becoming purple?

The plant cannot collect enough potassium in the soil, and it causes purple color on leaves, buds, trunks, or their combination. Also, some plants, including some Brassicas, are unable to take potassium during cold weather. So many plants are purple in cold weather.

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Brussels Sprouts Plant
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Why are my Sprouts loose?

Loose, open sprouting is caused by poor soil conditions. Always plant in firm soil. Plant transplants are deep, with the lowest leaf on the surface of the soil. 

What can I do to increase my Sprouts production?

Moisture and time are important for a bountiful and delicious crop. Brussels Sprouts in the sun and provides plenty of moisture, especially during hot weather. Adjust your planting time so Brussels Sprouts are ready for harvest before or after a hot dry summer.


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