Category Archives: Kettle vs. Microwave

Comparing the effect on plant growth of kettle-boiled water vs. microwaved water.

Microwaved water vs. kettle boiled water for plants – Part 11: Finished

Note: to see all the posts in this series, go here.

It’s time to transplant the plants, which means that the experiment has ended.  After almost three months, there is no appreciable difference between the plants which received kettle-boiled water and those that received microwaved water.  So, I think it’s reasonable to conclude that there most probably is nothing that microwaves do to water that is likely to be any more harmful to living organisms than is any other method of heating water.

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Microwaved water vs. kettle boiled water for plants – Part 10: Outside Over-exposure

I accidentally left the plants outdoors too long one night last week and they took a bit of frost damage.  Each one has some dying branches (see the first photo below) but also new growth at the top (see the second photo below, from the same plant).  Plants in each group appear to have received similar damage and are recovering similarly.

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Microwaved water vs. kettle boiled water for plants – Part 8: Pinching Back

All six plants have grown taller than I’d like.  So, I’ve pinched them back a bit (removed the new growing tip from each plant), something I learned about when I used to dabble in bonsai.  I also raised the light again.

The first photo below shows the plants before starting these procedures.  The second and third show a plant before pinching and the same plant after being pinched.  The fourth shows the plants put back in place with the light raised.

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Microwaved water vs. kettle boiled water for plants – Part 6: Staking

March 23, 2012

Morning: gave them each 1/4 cup water from the appropriate bottle.

Evening: the seedlings have grown a bit leggy and are starting to require support (see the first photo below), most likely a consequence of insufficient light compared to the temperature inside the room.  This might correct itself once the plants are moved outside but, for now, I have staked them with bamboo shish kabab sticks and string (see the second photo below).

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Microwaved water vs. kettle boiled water for plants – Part 5: Status Update

March 21, 2012

As you can see in the photo below, all six plants are doing well and there is no significant difference between the two groups, allowing for the fact that there will be variation and the numbers are few.  The three on the left are the ones receiving kettle-boiled water while the three on the right are getting microwaved water.

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