Creating a Rain Garden
In Poor Drainage Areas
It's Really Quite Easy.
I creatd a rain garden in very little
time, at
a low cost, and
with little effort.
Except for that digging thing.
One of my Louisiana Irises - great for bogs and poor drainage areas
Sweet Flag starts out a
bright green, then turns green with gold edges as it matures.
It stays evergreen (the garden was designed in USDA zone 8). It has a very "earthy" herbal
scent.
Tops at 12"wx12" high when mature. Likes wet feet, can even grow
immersed in water. Handles drought, and has no pest problems (except for rabbits and i can't say that i
blame 'em).
They are mounding
plants, and
dont' need trimming. Very beautiful when the wind blows, they add movement to your landscape. It can take sun and
some shade - i'm going to use it in the foreground of a lot of my plantings. It would make a fabulous lawn replacement
plant.
Below are plants purchased in 1 gall. pots, about 6" high. the sticks mark
newly-planted Louisiana Iris and Japanese Iris bulbs. Reminder: do not plant irises deep.
Most of my success with irises (photos of my beauties will be posted on this
site) is from planting with the top third of the bulb exposed, and ignoring them.
**They're also a xeriscape star - i haven't watered any variety of my irises in
more than 20 years.
Here is the rain
garden when it was new. It
needs no attention or maintenance.
Apparently, the weeds in the photo have been eliminated at the driveway edge
after i took the photo.
The area next to my
driveway, the right of way between houses that also leads me to my backyard gets water-logged after every rainy day. The area is not
useable for anything. Not even walking across. I didn't want to
invest in a french drain or new sump pump system, if i could use the area as a
water-loving garden
instead. Just like my bog gardens.
The only water the garden
gets is from the rain. Plants chosen were especially suited to the environment they're in, my planting zones, and my needs - My gardens
need to be self-sufficient, insect- and drought-resistant, resistant to animals whenever
possible. I traveled for months at a time.
I chose marginal pond plants, bog plants and flowering perennials that like wet
or dry feet.
The bog plants had to also
deal with occasional drying out and not need to be always
moist or wet. I used non-invasive Louisiana Irises, dwarf irises, japanese
irises, Rosa Rugosa (shrub roses), Sweet Flag grasses, and I covered the top with a layer of pea gravel - very pretty when water sits on top. The birds and dragonflies love it there.
Note: You can create rain
gardens in multiple planting zones with many of the same plants.
Low maintenance, colorful
and fragrant. The areas around the new garden are less saturated, there's less runoff from the driveway into the stormwater
drains. No chemical fertilizer needed, no insects except butterflies and dragonflies. I added epsom salts to
the growing area after i dug out the garden to give them a "green" boost,
and about once a month under each plant. Location of your garden:
anywhere rain puddles and runoff hang around for a few days
How I Created My Rain
Garden
Note:Never dig or use
earth-moving machinery without checking with the utility
commission to come out and mark your property for power lines, etc. it's free!
The hardest part is
removing all of the grass and weeds from the already soggy area, and digging the holes for the plants. I dug out all the grass carefully by hand,
as utility lines are buried in that side of my front yard, and i'm never feeling
lucky.
To find plants suitable for a rain garden to thrive in your hardiness zone, do
research online for "marginal
pond plants", aquatic plants, or "bog plants".
Always ascertain that you're not using an invasive pond
or marsh plant.
The "wildly" popular but very invasive Louisiana Yellow Flag Iris is being
promoted in certain zones
as a good bog garden plant - do NOT use this plant if you are planting near a neighbor
or in your front yard. You can place these in a planter to sit on top of the
rain garden.
This site has a
listing of invasive plants. I admit that I have successfully used some plants
considered mildly invasive in my region by controlling the plant's urge to
ramble, and keeping them in containers, tubs and pots. Using invasives in covering large, wild
areas where there are no neighboring properties, spreading is not a concern, and
is ok with me. Do not let your invasives wander into the wild where you
cannot control them. If you are not experienced in invasive plant control,
you should avoid planting them.
The Ladybird Johnson Wildflower
Center listing of invasive plants.
Remove all the sod, grass,
and weeds,
outline your garden with stones, or edging if you wish, but remember to leave
a small opening where the water naturally flows in to create the wet areas in the first
place.
I outlined the back of mine with brick edging left around the property. Recycle landscape materials when you can.
My edging is movable - as i expand the water garden, i'll move the brick pavers out a little more. I'll be adding sculptures and rock features as i go along.
Once the grass is
eliminated, dig the center of the garden a little deeper than the outer edges.
Dig out deeper areas with your trowel or shovel in various areas of your garden to create
valleys where water will pool more. Make sure that wherever the water runoff is coming from that originally started
you on this project can stillrun into the garden - you can dig a little bit of a downward slant from the
source of the runoff to the rain garden.
I added pea gravel to the
top to eventually blend in with the other gardens
i've started and to add a bit of a serene, bright and clean feel to the water area.
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