How to Grow Bean Sprouts in a Plastic Container: 5 Steps

Step-by-step guide to growing plump, white, low-rootlet bean sprouts at home using a plastic container. 5 simple steps, results in 3-4 days.

Table of Contents

What do you need to prepare to grow bean sprouts?
Which plastic container should you use to grow bean sprouts?
The 5-step method for growing bean sprouts in a plastic container
How important is hygiene when growing sprouts at home?
How do you store bean sprouts to keep them crisp?
What nutrients do bean sprouts contain?
Common mistakes when growing bean sprouts and how to fix them
Frequently asked questions about growing bean sprouts in a plastic container
Contact ICD Vietnam
References

Reviewed and updated by ICD - Week 43/2026

How to grow bean sprouts in a plastic container: soak 100 - 200 g of mung beans in warm water for 6 - 8 hours, spread them in a basket set inside a lidded plastic container, cover with a damp towel, press down with a weight and keep in the dark; water 2 - 3 times a day and drain off all the water. After 3 - 4 days, when the stems are 5 - 7 cm long, they are ready to harvest.

6 - 8 hours

Soaking time for mung beans in warm water

2 - 3 times a day

Water until soaked, then drain completely; never let the beans sit in water

3 - 4 days

From starting to sprout to harvest, sprouts 5 - 7 cm long

I am Le Van Thang and I have worked at ICD Vietnam since 2011. Quite a few customers buy small lidded plastic containers to grow sprouts, and the question I get most is not how to grow them, but why home-grown sprouts are not as white and plump as the ones at the market. This article answers both: the 5-step method in a plastic container, how to choose the right container, and what you need to know about hygiene so a batch is both tasty and safe.

Dark

Block out all light so the sprouts stay white and not bitter.

Press

A weight presses the stems so they come out plump with few roots.

Drained

Water enough, but all of it must drain away.

Growing sprouts at home lets you control your beans and water, with no worry about growth chemicals. The three words above are the whole secret: the container must be dark so the sprouts do not turn green and bitter, it must have pressure so the stems come out plump, and it must drain so the sprouts do not rot. The sections below go through each detail, with a day-by-day schedule.

What do you need to prepare to grow bean sprouts?

One batch for a family of 3 - 4 needs about 100 - 200 g of whole mung beans with their skins, clean water, a lidded plastic container of about 5 - 15 litres, a plastic basket that fits inside the container, a clean cotton towel and a weight to press down.

A glass bowl of whole mung beans next to other kinds of beans — Whole mung beans (bowl on the right): choose even, shiny beans with no mould so the sprouts come up uniformly

Whole mung beans, even, shiny and plump, with no mould and no shrivelled beans, preferably fresh.
Clean water for soaking and watering; if tap water smells of chlorine, leave it in a basin for a few hours to let the smell off.
A lidded plastic container wide enough to hold the basket with some space left under the base for water to run down.
A plastic basket that fits inside the container so the sprouts stay drained after watering.
A clean, dark-coloured cotton towel to cover the surface of the beans.
A flat ceramic plate and a clean weight such as a water bottle or a washed stone to press down.

Bean quality decides most of the result. Shrivelled, old or mouldy beans sprout poorly, and are also where fungi and bacteria take hold and then spread through the batch. When soaking, beans that float to the surface are usually shrivelled or spoiled, so skim them off at the start.

Which plastic container should you use to grow bean sprouts?

The best container is a virgin PP or HDPE plastic container with a tight lid, a dark colour, a capacity of 5 - 15 litres and a way for water to drain; a light-coloured or transparent container still works if you wrap it fully in a black plastic bag.

A small blue closed-wall solid plastic bin — A closed-wall solid plastic bin: keeps moisture and blocks light better than an open basket, but needs a basket inside because the base has no drain holes

On material, PP (code 5 in the triangle under the base) and HDPE (code 2) are the two common plastics for food boxes and containers. PP tolerates heat better so it suits soaking the beans in warm water, and PP is not made with BPA in its formulation (BPA is a substance associated with polycarbonate plastic). HDPE is durable and easy to wash. The differences between container plastics are compared in more detail in the article on what is a plastic container. A foam box (PS, code 6) holds moisture well but crumbles easily, is hard to clean and should not meet hot water. Never use a container of unknown origin or one that previously held chemicals, even after washing.

On container type, a solid plastic container with a lid (closed walls, no holes) is a compact choice: closed walls keep moisture and block light better than an open basket. The point to handle is that a closed-wall container has no drain holes, so you must put a basket inside so the water flows to the bottom, then tilt the container to drain it after every watering. If you dedicate one container to growing sprouts, you can drill a few small holes in the base so water drains by itself; in that case stand the container on a tray to catch the water.

Open container or closed container?

A plastic basket covered with a towel still produces sprouts, but an open basket lets light in and the towel dries quickly. Putting the basket inside a lidded container keeps it dark and holds moisture more steadily, especially in the dry season.

On colour, black or dark blue containers block light naturally. Many small lidded containers on the market, including ICD Vietnam’s 15-litre square lidded container (virgin PP, in blue, green, yellow or red), are bright colours, so when growing sprouts cover them with an extra black plastic bag or put the container in a cupboard or under a table where there is no light. On capacity, 5 - 10 litres is enough for 100 - 200 g of beans; a 15-litre container lets you grow more or spread the beans in a thinner layer. For a small batch, a 10-litre square plastic container (265 x 265 x 240 mm) is a handy size.

The 5-step method for growing bean sprouts in a plastic container

The method consists of soaking the beans, preparing the container, pressing and covering in the dark, watering daily, and harvesting after 3 - 4 days; each step has a sign that tells you whether you are doing it right.

Step 1: Soak the beans

Rinse the mung beans, discard any spoiled beans, then soak in warm water mixed at a ratio of 2 parts boiling water to 3 parts cold water for about 6 - 8 hours, until the beans have absorbed water, split their skins and started to show a sprout. Soaking too long makes the beans waterlogged and sour and lowers the germination rate. In cold weather the beans absorb water more slowly and can be soaked a little longer; seeing the skins split is enough.

How warm is “2 boiling, 3 cold” water?

Mix 2 parts boiling water with 3 parts room-temperature water (about 25 °C) to get water at about 50 - 55 °C, warm enough for the beans to absorb water quickly without cooking the sprouts.

A dish of mung beans that have just sprouted, with short white sprouts poking through the skin — Mung beans with split skins and short sprouts: just right to spread in the basket for growing

Step 2: Prepare the growing container

Wash the container, basket and towel before every batch. Put the basket inside the container so there is space under it for excess water to drain. Lift out the soaked beans, let them drain, then spread them evenly in a thin layer in the basket; a layer that is too thick easily becomes stuffy and waterlogged in the middle.

Step 3: Press and cover in the dark

This step decides whether the sprouts are plump with few roots. The pressure imitates sprouts having to push up through soil, so the stems grow thick instead of just stretching long.

Take a dark cotton towel, dip it in clean water, wring it out and cover the whole surface of the bean layer.
Place the ceramic plate on top of the towel.
Put the weight on the plate. This pressure will “squeeze” the sprout stems to grow thicker, making them plump.
Finally, put the lid on the container so it is completely dark inside, which keeps the stems pure white and not bitter.

The layers in a bean sprout container: a tight lid keeps it dark, the weight gives pressure, the basket and base hole let water drain

The diagram above shows the order of the layers from top to bottom. The ceramic plate spreads the force of the weight over the whole towel; put the weight directly on the towel and some spots get pressed and others do not, so the sprouts grow unevenly. With a completely dark container the stems do not turn green and are not bitter.

Step 4: Water every day

Water 2 - 3 times a day, in the morning, at noon and in the evening. Lift off the lid and the pressing weight, use a shower head or a jug to wet the towel thoroughly, then tilt the container to let all the excess water run out. Never let water stand at the bottom of the container, because that is the most common cause of sprouts rotting and smelling. After watering, put the weight back and close the lid as before. The day-by-day schedule for one batch is as follows:

When	What to do	Right sign
Day 0 (evening)	Rinse the beans, discard shrivelled ones, soak in warm water 6 - 8 hours	Beans have absorbed water and split their skins
Day 1	Spread the beans in the basket, cover with a damp towel, press, close the lid; water 2 - 3 times	Sprouts start to show clearly
Day 2 - 3	Water 2 - 3 times, drain all the water, keep dark	Stems grow longer, white
Day 3 - 4	Harvest, wash, drain, refrigerate	Sprouts 5 - 7 cm long, short roots

Step 5: Harvest

After about 3 - 4 days, when the stems are 5 - 7 cm long, they are ready. Lift out the whole mat of sprouts, put it in a basin of water, swirl gently so the bean skins float up and remove them, then let it drain thoroughly before putting it in the fridge.

Home-grown sprouts being thinner with more roots is normal

According to Assoc. Prof. Dr. Nguyen Duy Thinh, answering the Suc khoe va Doi song (Health and Life) newspaper, traditionally grown bean sprouts are usually thinner, ivory-yellow and have many roots; porcelain-white, plump, round sprouts with almost no roots may have been soaked in the growth stimulant 6-benzylaminopurine, which is not permitted in food. Pressing properly makes the sprouts plumper, but do not aim for sprouts identical to those at the market.

How important is hygiene when growing sprouts at home?

Very important: the warm, moist, nutrient-rich conditions that make beans sprout are also conditions for bacteria to multiply if the beans or equipment are contaminated, and a person growing sprouts at home faces this risk just as a commercial producer does.

The US Food and Drug Administration (FDA) records that from 1996 to 2020 the United States had 52 outbreaks of foodborne illness linked to sprouts, with at least 2,700 illnesses, 200 hospitalisations and 3 deaths; the pathogens included Salmonella, Listeria and several strains of E. coli. In outbreaks where a source was found, the seed was usually the source of contamination, but poor hygiene during growing also contributed. The University of Connecticut food safety material stresses that people who grow sprouts at home take the same risk as producers, and everything revolves around clean seed and good hygiene.

52 outbreaks

Linked to sprouts in the US, 1996 - 2020 (FDA)

4 °C

Fridge temperature to set when storing bean sprouts

Cooked

The surest way to kill bacteria in bean sprouts

Who should eat only cooked bean sprouts

The FDA recommends that children, older adults, pregnant women and people with weakened immune systems do not eat raw sprouts. For the whole family, choose clean beans, wash the container and basket before every batch, and wash your hands when watering and harvesting.

At household scale, the following are enough to cut the risk substantially:

Buy mung beans from a place with a clear origin and discard mouldy or shrivelled beans.
Wash the container, basket and plate with hot water and dish soap before every batch and dry them completely.
Wash the growing towel after every batch and dry it in the sun; do not reuse a towel that is still damp or smells.
Wash your hands before watering and when harvesting.
If you see mould, slime or an unusual smell, discard the whole batch, then wash and disinfect the container before starting again.

Healthy people who want to eat sprouts raw should wash them thoroughly in clean water and refrigerate straight after harvest; if there is someone in the at-risk groups listed above in the household, cook them thoroughly.

How do you store bean sprouts to keep them crisp?

Wash, drain thoroughly, line a lidded plastic box with dry paper towel, add the sprouts, cover with another layer of paper, close tightly and keep in the fridge at 4 °C or below; sprouts usually stay crisp for about 5 - 7 days.

Two clear plastic boxes with orange lids stacked on top of each other — A clear plastic box with a tight lid: good for keeping sprouts in the fridge, with dry paper towel at the bottom and on top

The paper towel absorbs leftover water, because wet sprouts in a closed box quickly turn slimy. The USDA FoodKeeper data says bean sprouts keep quality for about 5 - 10 days in a 4 °C fridge; for home-grown sprouts I recommend using them within about a week and discarding them straight away if they turn brown, smell sour or feel slimy. Do not leave sprouts at room temperature overnight.

What nutrients do bean sprouts contain?

Mung bean sprouts are a low-energy, high-water food: according to the USDA FoodData Central database, 100 g of raw sprouts contains about 30 kcal, 3.04 g of protein, 1.8 g of fibre and 13.2 mg of vitamin C, with the rest mostly water (90.4 g).

30 kcal

Energy in 100 g of raw mung bean sprouts (USDA)

3.04 g

Protein; fibre 1.8 g

13.2 mg

Vitamin C; plus folate 61 µg, vitamin K 33 µg

Home-grown sprouts taste sweet and crisp and go well with pho, summer rolls, stir-fried beef or soup. If the household has small children, elderly people or pregnant women, prefer stir-fried or cooked dishes.

A bowl of beef pho seen from above, next to a plate of herbs and bean sprouts — Bean sprouts served with pho: healthy people can eat them blanched, at-risk groups should have them fully cooked

Common mistakes when growing bean sprouts and how to fix them

The three most common mistakes are bitter sprouts from light getting in, rotten sprouts from standing water, and thin sprouts with many roots from too little pressure; each has a clear cause and can be fixed in the next batch.

Symptom	Cause	How to fix it in the next batch
Bitter sprouts with green leaves	Light is getting into the container	Use a dark container, close the lid tightly or wrap in a black plastic bag
Rotten, smelly, waterlogged sprouts	Water standing at the bottom	Drill drain holes, use a basket inside, tilt the container to drain all the water
Thin sprouts with long roots	Not enough pressure	Add weight, use a flat plate so the pressure is even
Many beans do not sprout	Shrivelled, mouldy or old beans	Choose fresh, even beans and remove the ones that float when soaking

On the water used for watering the sprouts: many guides advise reusing it to water plants. Water that has run through sprouting beans can carry bacteria from the seed; the FDA itself requires sprout producers to sample and test this water. At home, if you want to reuse it, only water ornamental plants, not raw-eaten vegetables, and do not leave the water standing overnight.

Frequently asked questions about growing bean sprouts in a plastic container

Why do you need to press bean sprouts?

The pressure imitates the sprouts having to push up through soil, which encourages the stems to grow thick and plump instead of just long, and also limits side roots. Put a flat plate under the weight so the force is spread evenly.

Pressure

Thick, plump stems

Fewer side roots

Crisper, better-looking sprouts

Can I use a clear plastic container?

Yes, but do not leave it uncovered. A clear container must be fully wrapped in black cloth or thick black plastic bag, or kept in a dark cupboard, so the sprouts do not turn green and bitter.

Besides mung beans, which other beans can be used for sprouts?

You can grow sprouts from black beans, soybeans (soybean sprouts) or mustard seed. Mung bean sprouts remain the most common and easiest to grow.

A bowl of mixed soybean sprouts, with yellow soybean heads — Soybean sprouts: thick stems and yellow bean heads, quite different from mung bean sprouts

Why are home-grown sprouts not as white and plump as those at the market?

Traditionally grown sprouts are usually thinner, ivory-yellow and have many roots. Porcelain-white, plump, round sprouts with almost no roots may have been soaked in the stimulant 6-benzylaminopurine. Even pressing, enough darkness and enough moisture will make home-grown sprouts plumper.

How many steps are there in growing bean sprouts in a plastic container?

There are 5 steps: soak the beans, prepare the growing container, press and cover in the dark, water daily, and harvest after 3 - 4 days.

How many beans do I need for one batch?

About 100 - 200 g of whole mung beans for a family of 3 - 4, using a 5 - 10 litre container. Choose even, shiny, plump beans with no mould and no shrivelled beans.

Soaking tip

Throw out the beans that float to the surface when soaking; they are usually shrivelled or spoiled.

How many kilograms of sprouts does 1 kg of mung beans make?

In a sand-bed sprout-growing village in Quang Ngai, growers say 1 kg of beans gives about 7 kg of sprouts (VnExpress); Wikipedia records that a traditional pot gives 8 - 10 kg of finished sprouts. Small home containers usually yield less and depend on stem length, so for 100 - 200 g of beans you should expect at most about 0.7 - 1.4 kg of sprouts if you reach the 7-fold ratio.

How many hours should the beans be soaked?

About 6 - 8 hours in warm water, until the beans have absorbed water, split their skins and started to show a sprout. Soaking too long makes the beans waterlogged and sour and lowers the germination rate.

Can I grow bean sprouts in a plastic basket with a towel?

Yes. A basket lined with a damp towel, covered with a dark towel and pressed with a weight still produces sprouts. However, an open basket lets light in and the towel dries quickly; putting the basket inside a lidded plastic container keeps it dark and holds moisture more steadily.

Open basket covered with a towel

Easy to do, but lets light in, the towel dries quickly, and you must water more evenly.

Basket inside a lidded container

Keeps dark and holds moisture steadily, excess water runs to the bottom of the container.

Can I grow bean sprouts in a foam box?

Yes, a foam box holds moisture well, but it crumbles easily, is hard to clean thoroughly and should not meet hot water. A PP or HDPE plastic container is durable and easier to wash and dry, so it can be used for many batches.

Is it safe to eat raw bean sprouts?

There is a risk. The warm, moist conditions for growing sprouts also suit bacteria such as Salmonella and E. coli if the beans are contaminated. The FDA recommends that children, older adults, pregnant women and people with weakened immune systems eat only cooked sprouts; healthy people should wash them thoroughly and keep them cold.

Groups who should eat only cooked sprouts

Children, older adults, pregnant women and people with weakened immune systems (FDA recommendation).

How many calories are in bean sprouts?

According to USDA FoodData Central, 100 g of raw mung bean sprouts contains about 30 kcal, 3 g of protein, 1.8 g of fibre and 13.2 mg of vitamin C, and most of the rest is water.

30 kcal

In 100 g of raw mung bean sprouts (USDA)

Contact ICD Vietnam

ICD VIETNAM INDUSTRIAL MANUFACTURING CO., LTD

If you need lidded PP or HDPE plastic containers for growing sprouts, food storage or use in a canteen kitchen, please contact us for advice on a suitable model and capacity: