Roadside Revegetation

IMPLEMENTATION GUIDES
minimize the potential for desiccation (Figure 10-126). Specially-constructed
Mylar® tarps can be purchased from forestry or restoration supply companies.
Plants that have been kept in freezer storage should be thawed prior to
transportation and planting. While small container stock has been shown
to have satisfactory survival when planted frozen, there is no indication that
large stock will perform the same. Once frozen seedlings have been thawed or
cooler-stored seedlings have been allowed to warm, they should be planted
immediately. Seedling viability will decrease if they are placed back into cold
storage for more than a few days.
Plants that have not been packed in storage containers must be transported
in enclosed units. Transporting plants in open vehicles, such as pickups,
exposes foliage to strong, drying winds which can unduly stress the plants.
Large container plants typically stand 2 to 4 feet tall (including the container)
and require transportation with enough space to accommodate the size.
Develop Planting Contract
The following discussion outlines some of the basic components that should
be addressed in a planting contract.
50
Location – A map of the planting areas should be included in the contract.
40
Planting Quantities – The quantity of species, by stocktype, must be presented
for each planting area.
30
Planting Method – There might be several planting methods which should
be indicated for each stocktype and planting area.
Plant Spacing Requirements – For each planting area, describe or define the
plant spacing at which each species will be planted. Calculations to determine
the proper spacing between plants was presented in Figure 10-117. Approximate distance
between plants can be determined graphically by knowing the target plants per acre, and, in
reverse, the plants per acre can be determined by knowing the target spacing between plants
(Figure 10-127). For example, if the plan calls for a density of 600 seedlings to be planted per
acre, the spacing between plants would be around 8.5 feet (Figure 10-127A). If the plan calls
600 seedlings to be planted in planting pockets of three plants per pocket, there would be 200
planting pockets spaced approximately 15 feet apart (Figure 10-127B). In another example, if
you want to know the number of seedlings to order for a given area with a target spacing of
6 feet, the number of plants required would be just under 1,100 seedlings (Figure 10-127C).
Temperature (˚F)
110
100
90
80
70
60
A
B
9 10 11 12 1 2 3 4
Time of Day
Dark-Green Canvas
Bagged Seedlings - Sun
White Cloth Sheet
Air Temperature - Sun
Mylar ® Silver Surface
Mylar ® White Surface
Bagged Seedlings - Shade
Figure 10-126 | Protect nursery
stock during transportation
During transportation and onsite storage,
nursery stock should be covered
with special reflective tarps (A) which
have been proven to reduce temperature
buildup (B).
Spacing Between Plants
24
22
20
18
16 B
15
12
10
A
8
6
Figure 10-127 | Estimating
spacing between plants
Approximate distance between plants can
be determined from this graph by knowing
the target plants per acre, and, in reverse, the
plants per acre can be determined by knowing
the target spacing between plants.
4
2
0
100 200 400 600 800
C
1,000 1,200 1,400 1,600 1,800 2,000
Plants per Acre
Roadside Revegetation: An Integrated Approach to Establishing Native Plants and Pollinator Habitat
361