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Algae Versus Lichens in the Garden
By
James Kilkelly
What is your opinion on algae and lichens within the garden? Are you trying
to discourage them or are you one of the select few who promote their growth.
Let me introduce you to these algae and lichens, so you can make an informed
decision.
Algae in glasshouses and polytunnels
Algae are the much-maligned green slimes found on ponds and as a greenish
scum on paths and drives. You may be surprised to know algae is actually a
garden plant, albeit a stem-less and non-flowering specimen. Over winter,
disgusting greyish-green algae often builds up on the inside glass of our garden
sheds, glasshouses and polytunnels. The solution is to trim back any surrounding
planting to allow as much light as possible to enter. Also try to leave the
doors and windows open for a few hours each week to prevent the build up of
stagnant air. If some of the slightly powdery scum still builds up, you can wipe
it off glass with a mild detergent, whereas on polytunnels only wipe the plastic
with warm soapy water.
Algae control on steps and paths
Algae and mosses often coat paths and quite dangerously garden steps; damp
shade is again a big factor. Reducing shade will cut down on the amount of algae
and moss forming; by increasing the access of sunlight, you will also reduce
dampness. The application of a copper sulphate solution (commonly known as
bluestone) is a time honoured and effective way to combat algae on paths. When
applied correctly it has a residual effect that prevents regrowth for up to
several years after treatment. Mix copper sulphate or "bluestone" at a rate of
10 grammes to 10 litre of water in a plastic container. Apply on a dry day,
brush in, and then leave it 3 weeks to act on the algae. After 3 weeks brush
again with a stiff bristled brush and "hey presto". When applying any algae or
moss control solution remember to avoid drift onto surrounding lawns, plants and
vehicles. Use protection equipment when applying chemicals including a mask with
a dust cartridge, safety goggles and impervious gloves with overalls. Remember,
apply all chemicals according to the manufacturer’s instructions and heed those
safety warnings.
Lichens in the garden
However, what happens when this algae teams up with a fungus and the two
start to live in a mutually advantageous association or symbiosis? Well, in that
situation you get a plant form known as a lichen. A situation where lichens grow
in abundance is on old carved stone headstones in graveyards. Many of the
age-old stones will display white growths often containing bright yellow or
orange splashes.When I have occasion to attend a funeral in a graveyard, I am
always struck by the contrast between the mourner’s dark garb and the pings and
flecks of white, yellow and orange lichen growth. These growths are the lichens,
growing where other plants would falter Lichens are tough devils, if there was
an SAS for the plant world they would be the first to enlist.
Growing your own lichens
I feel lichens have a place within the garden, they happen to be an accurate
indicator of low pollution, no harm in that. Lichen growth also adds a
considerable amount of character to feature rocks, boundary walls, terracotta
containers and stone garden sculptures. If you would like to encourage this type
of growth, try this recipe for "lichen slurry". Mix one tablespoon of ground up
lichen to one pint of natural yogurt or buttermilk and mix well. Paint or dab
this slurry onto the object you wish the lichen to grow on, sit back and be
prepared to wait, as fine-looking lichen growth is quite slow to form. But,
worth it.
James Kilkelly runs a professional garden design service in Galway, Ireland.
He has a regular gardening column in an Irish regional newspaper. Visit his
website at
http://www.gardenplansireland.com/ He also regularly posts his expert advice
to a gardening community at
http://www.gardenstew.com/.
Article's original location:
How to Keep Your Plants in Bloom with Dead-heading
Article Source:
http://EzineArticles.com/?expert=James_Kilkelly
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