Soaker hoses are a
commercially available and relatively inexpensive way to water.
They can be used on trees, but they are much better suited for
flower beds and shrubs.
A soaker hose looks like a black garden hose but it is made out
of a porous material that allows water to seep out evenly along
the entire length of the hose. Many soaker hoses can be tied
together, but very long strands may have a higher leakage rate
at the spigot end because the pressure will drop farther down
the line. To maximize effectiveness and minimize evaporation it
should be covered with soil or mulch.
The best way to
insure proper watering is invest in a
watering method that's fast,
applies a known quantity, and requires no additional
maintenance. Start a weekly routine you'll stick to!
Quantity per application is nearly impossible to judge. Hose porosity
will differ between manufacturers, water pressure has an effect, and
there is no practical way to catch the water to do a timed test.
Speed is also difficult to compare with soaker hoses. In
order to make it quick and painless, you'll need to have one at
each tree. If you have more than a few trees you'll also need a
lot of hoses and some splitters to charge each one. You will
also need to turn it off at some point.
Soaker hoses are just not a practical approach for water
multiple new trees.