Geraniums have long been a popular plant for both outdoor and
indoor use. The common geranium can be grown in beds or
containers and will do well in either. The ivy leafed geranium
is a natural for hanging planters. The Regal or Martha
Washington geranium does not do well outside and should be
indoors.
Growing Geraniums In Beds
To plant geraniums outdoors, you must wait until all threat of
frost has passed. Pick a spot that is sheltered from strong
winds and gets at least 6 hours of sun a day. The soil should be
well drained and mildly acidic (pH of 6.5 is ideal). Geraniums
need fertilization for best growth and they thrive in beds that
have a good supply of nitrogen. Before planting, apply a 5-10-5
fertilizer to the soil. After planting, you should fertilize
every month with a 10-10-10 fertilizer. Mulch the area and water
at least once a week.
Growing In Planters Outdoors
Geraniums can be grown in planters on the porch, patio or
garden. The ivy type geraniums are great for hanging baskets and
window boxes. Make sure you use a container that is big enough
for the plant or it will wilt (you may need to replant to
prevent wilting as the plant grows). Use a soil that has enough
aeration – either a commercial made mix or garden soil mixed
with peat moss or perlite. Make sure you water it frequently but
do not let it sit in water.
Growing Indoors The Martha Washington geraniums are not
suited for outdoor growing but can be beautiful indoor plants.
Put our plant in a sunny window for best flowering. Plant in a
well drained soil and use a fertilizer formulated for indoor
plants. Fertilize monthly when plant is flowering but cut back
to every two months in the fall and winter. Your geranium will
do best if the day time temps are around 65 degrees with night
temperature around 55.
Disease
Geraniums are hardy, but like any plant can be susceptible to
disease. Some common disease are Black Leg where the stem
becomes blackened and the leaves fall off, Leaf Spot
where leaves become spotted and drop off, Gray Mold where
the plant has gray moldy spots, Rust where the plant gets
rusty looking spots and leaves turn yellow and drop off, Root
Knot nematodes -swelled roots and stunted growth and
Dropsy which produces lesions on the plants.
To combat most disease, remove all leaves that are infected,
make sure you do not take cuttings from any plant with disease.
When watering make sure you do not splash the leaves.
Pests
Some common geranium pests include:
Caterpillars - some caterpillars like to much on
geraniums (perhaps they have heard of it’s medicinal
properties?). These can be controlled with sprays.
Aphids - try controlling aphids with ladybugs or a
special spray.
Whitefly - usually starts in the greenhouse but can
spread to the garden on infested plants. Small white flys and
black sooty goop can be seen on the leaves which will fall off
after turning yellow. Can be controlled with sprays.
Mites - Causes leaves to curl and drop off – control with
sprays.
Termites - Subterranean termites tunnel through the stems
of geraniums causing them to turn yellow and die. Treat the soil
with the appropriate termite treatment. Don’t let them get to
your house!
Slugs - slugs love gardens but they also love beer. Leave
a saucer out and you will catch more than your fair share of
slugs!
About Author :
Lee Dobbins writes for http://www.geranium-flowers.
com where you can find out more about geraniums. Visit http://ww
w.geranium-flowers.com/Geranium-Care.html for more on
Geranium care.