It's tough to answer without knowing what type of mortar you are using. By "type" I mean N, S, or M. In addition to "BASALITE," somewhere on the bag it should tel you the type.
Since it's a wall in your front yard, I'm guessing it's non-structural, and being constructed of typical brick. For that, Type N mortar should do the trick.
Type N consists of 1 part cement, 1 part lime, and 5 parts sand.
Type S is "harder"...it has more compressive strength, but is less plastic due to having less lime, and proportionally, more portland. This makes it, for some, slightly harder to work with.
Type S has 1 part cement, 1/2 part lime, and 4 parts sand.
So, if you have Type S and want to turn it into Type N, for every 5 1/2 shovels of dry mix, add one shovel of sand and 1/2 shovel of lime.
If you're having trouble with Type N, add about 1 shovel of lime for every 10 shovels of mix.
Still, Type N should work for you. If not, you may be mixing it too dry, or mixing up too large of a batch, causing it to set slightly before you get around to using all of it.
For proper consistency, you should be able to butter the side of a brick and not have the mortar fall off. It may droop some like peanut butter would, but it shouldn't fall off.
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