Plant
Estimating Chart 
Example:
if you select 18"
spacing and need to
cover 300 square feet,
the box where that column
and row intersect tells
you that you need 133
plants.
If
you don't see your exact
coverage area listed,
either estimate by selecting
the closest area listed
or use the second chart
below ("Plant Caculator")
to precisely calculate
how many plants you
need.



To
print the chart right
click on on the image
and select 'Print' or
'Print Picture' from the
dropdown menu 




Plant
Calculator
Use
the plant calculator below
to determine how many plants
to use per square foot of
space to be planted  particularly
groundcovers, annuals and
perennials.
To
accurately use chart you must
first know how far to properly
space the type of plant you
are planting. In the 'Plant
Files' section of the
site you will find description
files for many of the popular
plants that perform well in
Zone
8. Included in every description
is a suggested spacing. 

Example:
you want to cover an area of
120 square feet with a spacing
of 10". For 10" spacing
the plants per square foot is
1.45. Multiply 1.45 x 120 and
you get 174 plants needed. 
(Area in square feet) x (Plants
per Square Foot) = Number of
plants needed 


Formulas
for figuring square feet
Squares
and rectangles 
Length x width


Circle
 3.14 x radius squared
 (Radius is distance from center
of circle to perimeter / or
half the distance of the diameter)
(Radius squared is radius x
2) 