
Having tried fairly ineffectively to grow salt crystals for a week on a bit of old string (next), I’ve since discovered a great way to make an entire Salt Crystal Garden (scroll down)!
Our science project extraordinaire started off with growing salt crystals using Tesco’s el cheapo salt from the back of the cupboard, left over from when I dyed my trousers, BUT after exactly:
- 7 days
- 1/2 cup salt
- half a jam jar of water
- a bit of old string
…we ended up with a selection of measly sized cuboid crystals that were only a tiny bit interesting. Well, the kids looked at me and said ‘oh is that it?’ I think they should have been more interested than they were considering the thought I’d put into it, but what can you do?

Now the kids were really revved up and wanted to see some serious results, so I went back to the internet and we decided to go the epsom salts route. BINGO! Very impressive, and it all happened overnight while we were sleeping! I didn’t even need to listen to the kids ask a squillion times if it was ready yet. I opened the fridge to get a pepper out, and there is was looking at me – a substantial and very snazzy looking salt crystal garden!
What you need:
- 1/2 cup epsom salts
- 1/2 cup very hot tap water
- grain of sand (or another kind of fleck of something or some grit/soil possibly??)
- food colouring
- fridge & freezer
What you do:
- Mix everything together (minus the fridge & freezer).
- Pour into a container (or split into several).
- Stir for 2 minutes!
- Into the freezer for 10 minutes.
- Into the fridge overnight (at least. Longer for more dramatic effects).
- Pour out the excess coloured water (either away or into other containers or on to plastic lids to carry on experimenting…).
- Admire!
What you DON’T do:
- Use boiling water.
- Leave it at room temperature (the crystals will vanish!).
- Miss out the freezer step. Well you can but apparently the results are less reliable.

You can play with the crystals but they’re very fragile, so you might need to do some expectation management.
Try growing them in glasses with a different colour in each one, and make an extra snazzy salt crystal garden!
Don’t forget to look at our other fun craft activities!
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Emily x
Definitely need to try this Sounds fun Thank You
Wow! never seen this before! My twins would love it too! Thanks for sharing and linking up #sundaystars Jess xx
It’s very dramatic and next to no effort! Thank you for commenting xxx
Ok!! Firstly….don’t mix the fridge freezer in! Properly made me laugh!! Secondly….how seriously cool is this!!
Absolutely love this and will definitely 100% do this in the week. Thanks for linking up with us on the #bigfatlinky
Ha ha glad to give you a giggle. One can’t leave ambiguous recipes though can one? It’s soooo cool and funky and the kids had a great time poking about in all the crystals 🙂
Very impressive! We need to try this! 🙂 xx
Isn’t it great? The kids also enjoyed poking about with the crystals. Can’t believe how easy it is! Thank you for commenting x
They look very impressive 🙂 Where did you get the epsom salt?
#brilliantblogposts
They really are – I was so surprised!! Either amazon, eBay, chemists (more expensive probably), some garden centres… They’re still in our fridge, growing and growing!