Instructables
Picture of Mix your own garden loam

Loam is a necessary garden clay mix that is easy and inexpensive to prepare.

Autumn is the time of year to start separating your water lilies. This means you must have garden loam for your soil medium.  Regular potting soil will not work, because it is light weight and will float to the water surface - making your pond very dirty!  
 

 

 
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Step 1: Loam Ingredients

There are a couple places where you can find loam ingredients, even if you live in the city. Loam ingredients will not harm goldfish and mosquito minnows.  If you have koi in your pond, then you must choose a sterile soil that is free from parasites. For the rest of us mix... 

2 parts clay soil
Can be found at a sand and gravel yard, your backyard, or near a river or lake.

1 part river sand (not ocean sand)
Can be found at a sand and gravel yard or near a river or lake. You can also purchase "playground" sand from a hardware store. Make sure it is not sand used for concrete. The best sand is the kind that has flecks of iron pyrite (which is not in playground sand). River sand often has iron pyrite. Sand and gravel yards also carry river sand.

1/2 to 1 part pea gravel or silt (optional)
Can be found near a river or lake, and your local hardware store. I do not care for pea gravel, because it makes it difficult to fertilize the lily plant.

Cost for a 5 gallon bucket of clay soil and a 5 gallon bucket of river sand from the sand and gravel yard = $6.  This is a great deal, because it is far more expensive if you buy it already mixed from a nursery.
JRT2565 months ago

Could you be a bit more specific about clay than that I should find it at a sand and gravel yard. I can't find it at a local sand and gravel yard except for Adobe which I doubt is the right thing to use.