17) Growing mung bean sprouts

In this tip:

  • Introduction
  • A)# Quantity
  • B)# Storage and use
  • C)# Growing sprouts in 2 plastic boxes (clinging water)
  • D)# Growing sprouts in a water bath
  • E)# Growing sprouts in a machine (info Gerard)
  • F)# Growing thick mung bean sprouts (Lucy’s info)
  • G)# Growing sprouts in moist clothes
  • H)# Mung bean plants in the garden

Introduction:

Mung bean sprouts can be grown indoors. See descriptions in this tip.

When you select “growing mung bean sprouts ” at Youtube, you’ll find many videos about this topic.

In this tip, 4 methods are described:

  1. Chapter C)#; Growing in a plastic tray with bottom holes. Under this tray there is a leak tray. After spraying or rinsing the beans, there is only only clinging water for the sprouts to grow. Over the trays is aluminium foil to darken. Air can pass between the aluminium foil and the trays. I found this procedure    here    .
  2. Chapter D)#; Growing in a plastic tray with bottom holes on (in) another plastic tray. The lower tray contains water. The mung beans in the upper tray are half in water. This way of sprouting has been invented by Hetty, a Dutch lady.
  3. Chapter E)#; Growing in a machine. Info and photos from Gerard, a Dutchman.
  4. Chapter F)#; Growing in plastic ice cream boxes. On top of the growing sprouts there is another ice cream box filled with pebbles to make the sprouts thicker. All info and photos original from Lucy, a Dutch lady.

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A)# Quantity

When you need only few sprouts, you can buy small amounts of mung beans in a garden shop. Price about €3.00 for 100 grams.

When you want to grow many sprouts, you better buy the mung beans at specialized greengrocer’s or in a Toko or on the internet. Mostly for a lower price.

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B)# Storage and use

Mung beans can be stored in a glass pot with a lid on it. It is good to use an egg-cup to measure quantities of mung beans.

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C)# Growing sprouts with clinging water

This procedure has been derived from this  video   .

C1) Needed and making;

  • One plastic freezing box (with no holes). Called a TRAY here.

  • One plastic freezing box of the same size with holes.
    • To make the holes in this box, acts as follows;
      • Drill 8 small holes (2 millimeters (1/12 inch) diameter) in the bottom.
        • Hold a small block of wood at the inner side of the box,
        • Drill each small hole in the bottom from the outer side.
      • You can also drill a big hole (diameter about 6 millimeter (1/4 inch) in each short side of the box. Use it for fast draining of water.

(The plastic freezing box with holes is called a HOLES TRAY here)

  • One plastic lid fitting on each freezing box.

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C2) Clean 2 trays and 1 lid

  • Clean the TRAY, the HOLES TRAY and the lid in hot dish water. Rinse and dry them.

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C3) Put dry mung beans in the TRAY

  • Put one layer of dry mung beans in the TRAY, covering 1/3 of the bottom. By absorption of water, the mung beans become 3 times as big.

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C4) Clean the mung beans in water

  • Pour cold tap water in the TRAY to clean the mung beans.
  • Hold the TRAY skewed to drain off water (the beans remain in the TRAY).
  • Repeat pouring in and draining off water for 5 times.

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C5) Soak the mung beans in cold water

  • Pour cold tap water in the TRAY with mung beans. Water level about 1 centimeter (0.5 inch) above the beans.

  • Lay a well fitting lid on the TRAY with mung beans.
  • Let the beans soak in water at about 18 to 20 C (64 to 68 F).
  • Refresh the soaking water each 8 hours.

  • After 2 days, the mung beans have soaked enough;
    • One layer of soaked beans fill (almost) the whole bottom of the TRAY.
    • Some soaked mung beans can have tiny roots already.

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C6) Put the soaked mung beans in the HOLES TRAY

  • Do the next actions outdoors or above a kitchen sink:
    • Pour water with soaked beans from the TRAY into the HOLES TRAY.
    • Let the soaking water drain off through the bottom holes in the HOLES TRAY.
    • Rinse the mung beans in the HOLES TRAY with cold tap water.
    • Hold the HOLES TRAY (with mung beans) horizontally for about 10 seconds; drain most of the water.

  • Put the empty TRAY on the kitchen counter or table.
  • Put the HOLES TRAY with wet mung beans on (in) the empty TRAY.
  • You end up with 2 trays on each other.
  • In the upper HOLES TRAY there are mung beans with clinging water.
  • The bottom TRAY acts as a leak tray.
  • Put the whole on a table or on another horizontal surface indoors.

  • Put aluminium foil over the 2 trays on each other.
  • At the bottom, fold the foil a little to make a narrow air opening.
  • Put the whole in a room at about 20 C (68 F).

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C7) Grow mung bean sprouts.

  • Execute the following actions every 8 hours:
    • Transport the whole to a kitchen sink.
    • Remove the aluminium foil.
    • Take the HOLES TRAY (with mung beans) off the TRAY.
    • Rinse the mung beans in the HOLES TRAY with cold running tap water.
    • Hold the HOLES TRAY (with mung beans) horizontally for about 10 seconds; drain most of the water.
    • Drain the water from the bottom TRAY.
    • Put the HOLES TRAY with wet beans on (in) the empty TRAY.
    • Put aluminium foil over the 2 trays on each other.
    • At the bottom, fold the foil a little to make a narrow air opening.
    • Put the whole in a room at about 20 C (68 F).
  • Repeat the above mentioned steps after about 8 hours again.

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Mung bean sprouts after a few days.

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C8) Remarks:

  • Cleaning the beans (rinsing 5 times) is sufficient. During the growth of the sprouts, the beans and/or sprouts don’t stink (smell bad).
  • When the sprouts and/or beans do stink (smell bad), execute as follows:
    • Put all these beans and sprouts from the HOLES TRAY in your compost container or at the municipal waste.
    • Clean, rinse and dry the TRAY, HOLES TRAY and lid.
    • Put new mung beans in the TRAY.
    • Pour cold tap water in the TRAY to clean the mung beans.
    • Hold the TRAY skewed to drain off water (the beans remain in the TRAY).
    • Repeat pouring in and draining off water for 10 times.
      • During this, you can clean the beans using a washing-up brush.
      • And/or do an extra rinse of beans in a kitchen sieve under cold running tap water.
  •  

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D)# Growing sprouts in a water bath

D1) Hetty’s method:

Hetty wrote a reaction about her method of mung bean sprouting. See 2 photos further in this post.

Use 2 empty “mushroom boxes”. One mushroom box is not adapted (TRAY). At the other box, put 12 small holes in the bottom and 4 holes on top in 2 opposite sides (HOLES TRAY).

Put dry mung beans in the TRAY. Add cold water. Soak the beans in the TRAY with water until the bean skins have cracked.

Put the soaked beans in the HOLES TRAY. Put fresh water in the TRAY. Put the HOLES TRAY (with beans) on (in) the TRAY with water. The beans are half in the water. Put the whole at a dark place at about 20 C (68 F). Each 12 hours, water is refreshed.

This growing method works well, see photos below;

Hetty’s growing set made of 2 mushroom boxes and 2 satay sticks.

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D2) Hetty’s method using freezer boxes:

I tested the method of Hetty using 2 freezer boxes. Below a description.

D3) Boxes:

Use freezer boxes with a flat bottom and “special sides”(see photos below), to be sold in a shop for household goods.

Square freezing boxes (12 x 12 x 8 centimeters, 5 x 5 x 3 inch). At 2 boxes on each other, there is 1.5 centimeters (0.6 inch) room under the upper box. So no satay sticks needed.

Use 2 boxes; 1 TRAY and 1 HOLES TRAY.

Making a HOLES TRAY: at one box, drill 5 small bottom holes and 2 side holes. The dimensions of these holes are the same as described at C1).

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D4) Soaking in water

I did a test with many mung beans or few mung beans in a box.

Two TRAYs with cleaned mung beans. Left many beans, right few beans. Add water, refresh the water each 12 hours.

After 2 days in water; thick beans with cracked skins. Left many beans, right few beans.

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D5) Growing mung bean sprouts

  • Do these actions at each tray:
    • Pour (put) the soaked beans in a HOLES TRAY.
    • Rinse the TRAY and put cold tap water in.
    • Put the HOLES TRAY with beans in (on) the TRAY. The beans are half covered with water.
    • Put the whole on a dark place at about 20 C (68 F).

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D6) Rinsing and refreshing:

  • Rinse the growing sprouts under running cold tap water.
  • Refresh the water in the TRAY.
  • Do these actions every 8 hours.

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D7) Harvest.

Sprouts after 6 days of growing. Left many beans, right few beans.

Some sprouts; left side many beans, right side few beans.

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D8) Conclusions

  • Mung bean sprouts in the “many” group are smaller than in the “few” group.
  • Advice; don’t put too many dry beans in a TRAY.
  • Covering 1/3 of the bottom of a TRAY is okay.

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D9) Summery

  • The method of Hetty is a good one. It is very easy to make a growing set out of 2 boxes. 
  • You can also use the big boxes from chapter C)# to grow sprouts.
  • Don’t put too many dry mung beans in the TRAY; maximal about 1/3 of the bottom surface covered.
  • The Hetty method is more difficult than the method of chapter C)#. You must have just enough water in the TRAY to have the beans in HOLES TRAY half immersed.

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D10) More sprouts

When you want to grow more sprouts, use bigger boxes.

These boxes are described in chapter C)# Growing sprouts with clinging water.

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E)# Growing sprouts in a machine (info Gerard)

Gerard described a sprouting machine.

The beans are on 2 sieves (platforms) in the machine. A rotating sprayer sprays warm water on the beans.

During growing, the lid is on the tool and there is a black cover over the whole.

Mung bean sprouts grown in the machine.

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Working method

Below a description of growing sprouts in the machine (info from Gerard)

E1) Weighing beans and sorting out

  • Weighing 150 grams of mung beans.

  • Sorting out and removal of bad beans.

  • Good mung beans; 143 grams

  • Bad beans (broken, dried out, weird color).

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E2 Washing beans

  • Add water to the mung beans in the tray.

  • Put a lid on the tray. Shake the whole above the kitchen sink.

  • Pour water and beans out of the the tray into a sieve.
  • Put the beans from the sieve back into the tray.
  • Repeat this washing (add water, shake, drain off) several (5) times.

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E3) Weighing water, heating water and pouring in

  • Weigh 1150 grams of water in a pan.

  • Heat the water in the pan to 38 C (100 F).

  • Pour all warm water in the water tank.

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E3) Building machine up and putting beans in

  • Put the green compartment on the water reservoir.

  • Divide the washed mung beans over 2 platforms.

  • Remove the plastic tube,
  • Put the first platform with beans in the machine,
  • Put the second platform with beans on top of the first platform with beans,
  • Put the plastic tube in the machine again.

  • Put the rotary sprinkler on op of the plastic tube,
  • Put the machine at a place with enough ventilation (air circulation).
  • Put the lid on the apparatus. The machine only works well and safe with the lid on.

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E4) Switching on and use

  • Put the power plug into the mains socket.
  • Push the on/off button (plug symbol).
  • Push the right temperature button (thermometer symbol).

  • (On this photo, the lid is not on the machine to make things visible. But at normal use, the lid is on the machine).
  • The pump starts and water spraying begins.
  • This step takes about 1 minute. Then the pumping and spraying stops.
  • (Each time there is 1 minute of spraying after 20 minutes of pause).

  • During use the lid is on the machine.
  • Put the black cover (“Batman cover”) over and keep it over the machine to have the sprouts growing in the dark.
  • During the growing of sprouts, the black cover is over the machine.
  • Let the mung beans germinate and grow in the machine (power plug in the mains and tool “on”).

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E5) Growing sprouts and refreshing water

  • After 12 hours of processing, pull the power plug out of the mains socket .
  • Remove the black cover.
  • Remove the lid.
  • Take off the sprinkler (sprayer).
  • Remove the green compartment and the 2 platforms with mung beans.
  • The photo above shows mung beans after 12 hours of germinating.

  • Pour the brown colored water out of the tool.

  • Use a moist cloth or a piece of kitchen paper to remove brown stains.

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  • Pour fresh warm water in the water reservoir of the machine.
  • Build up again;
    • Put the green compartment on the water tank.
    • Put 2 platforms with mung beans (one on each other) in the compartment.
    • Put the water tube in the tool.
    • Mount the sprinkler (sprayer).
    • Put the lid on the tool.
  • Put the power plug into the mains socket.
  • Push the on/off button (plug symbol).
  • Push the right ambient temperature button (thermometer symbol).
  • Put the black cover over the machine.

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  • During growing, the sprouts on the lower plateau force up the upper plateau with growing sprouts.

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E6) Water refreshment, cooling storage water and harvest

  • Refresh water after 24 hours (as described at chapter E5).

  • (Put a bottle with 1.8 liter of fresh water in the refrigerator, for later).
  • After 24 more hours, the sprouts are big enough to harvest. This is 60 hours after start.
  • Pull the power plug out, remove the black cover, remove the lid and take off the sprinkler (sprayer).
  • Take the platforms with sprouts out of the machine.

  • The 2 platforms with mung bean sprouts.

  • Take the sprouts from the plateaus.
  • Break off the roots from all sprouts. Put the roots in a compost container.
  • Breaking off roots can take a long time.
  • Gerard suggests using scissors or a sharp knife to cut these roots (while the sprouts are on the platform).
  • Put all sprouts in a tray or bowl.
  • Starting with 150 grams of beans, the tool can grow 1040 grams of moist sprouts with roots within 60 hours of processing. Dry sprouts without roots; 650 grams.

  • Get the can with water from the fridge.

  • Pour the cold (cooled) water in the bowl filled with sprouts. Sprouts can be stored in the fridge for a few days.

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E7) Info about the machine

Parts:

  • Base station with green compartment,
  • Two platforms,
  • Water tube,
  • Rotary sprinkler,
  • Lid,
  • Black cover.

Base station with tank (reservoir).

Control panel: 1 on/off button and 3 buttons for temperature.

Base plate, info, 220 volts, 50 Hertz, 20 watt.

  • Pump (middle of the photo),
  • Heating element (orange strip at the right),
  • Print board (for clock, pump on/off, heater on/off).

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F)# Growing thick mung bean sprouts (Lucy’s info)

F1) Introduction

The sprouts that grow using these methods are thinner than greengrocer sprouts. See photos below;

Greengrocer sprouts.

Home grown sprouts.

To grow thicker sprouts, you put a weight on top of the sprouts during growing. Info on the internet, for example here:   sv-jedi  (in Dutch) and  sproutpeople  .

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F2) Growing method of Lucy

Lucy has this way of growing thick sprouts.

Needed:

Three empty ice cream boxes.

  • Make many small holes in the bottom of 1 box (left side box), a HOLES TRAY.
  • In the 2 other boxes there are no holes in the bottom.
    • One box is used empty (middle box), a TRAY.
    • One box is filled with small pebbles (right box), a WEIGHT TRAY.

  • Fill one box (box with no bottom holes) with small pebbles. Weight about 800 grams. The WEIGHT TRAY.

(Filling with pebbles is better than filling with water; the box with weight can go skew during growing sprouts).

  • One piece of plastic mesh (cut from an old kitchen sieve).

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Growing sprouts (Lucy’s method)

  • Soak mung beans for 24 hours in a cold water in the TRAY.
  • Put the HOLES TRAY in (on) the TRAY.
  • Lay the plastic mesh in the HOLES TRAY on the bottom holes.
  • Put the soaked mung beans on the plastic mesh in the HOLES TRAY.
  • Put a dark piece of fabric or dishcloth over the whole.
  • Rinse the sprouts and beans as follows, twice a day:
    • Remove cloth,
    • Take the top HOLES TRAY with beans from the bottom TRAY.
    • Rinse beans in the HOLES TRAY with running tap water,
    • Empty the bottom TRAY.
    • Put the HOLES TRAY with beans on the TRAY again.
    • Put on the cloth.

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  •  After 2 days of growing, put the WEIGHT TRAY with pebbles on top of the sprouts in the HOLES TRAY. Put the cloth over the whole again.
  • Rinse the sprouts and beans twice a day, using the same procedure as described above.
  • Let the sprouts grow bigger.
  • The thin roots of the sprouts grow through the mesh holes towards the bottom TRAY.

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Skewed

During growing sprouts, things can happen; the WEIGHT TRAY goes skew.

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Harvest

  • When sprouts are big, you can cut the roots using a sharp knife.

  • Harvest: thick sprouts with no roots.

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G)# Growing sprouts in moist clothes

P1000450 tauge Johan

Or grow sprouts between 2 moist clothes, see this photo of Johan. 

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H)# Mung bean plants in the garden

You can grow mung bean plants in your garden. Two sites on the internet;

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I have tried to grow mung bean plants in the garden soil;

  • Lay dry mung beans in a tray on 6 layers of moist kitchen paper.
  • Put a fitting lid on the tray.
  • Put the whole on a warm place and let the seeds germinate.

  • After a few days, the plants are big enough to replant.
  • Take the lid from the tray.
  • Pick the biggest plants carefully from the paper.
  • Put the lid on the tray again and let the other plants grow bigger on a warm place.

  • My biggest mung bean plants, picked from the moist kitchen paper.
  • These plants have well developed roots.

   

  • Put each plant deep in a flower pot filled with sieved garden earth and compost.
  • Put the flower pots indoors before a window and let the plants grow bigger.

  • Or put them in a mini greenhouse, outdoors by day, indoors by night.

  • Let the plants grow bigger.
  • Put the plants in the garden soil in the summer.

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Replant the plants at a warm, sunny, sheltered spot in your garden. Or under a tunnel greenhouse. Plants grow well under warm conditions. At cold, wet weather, they die (my experience).

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