Botanical Name
Pelargonium x hortorum
Hardiness
Tender annual
Height
12 to 20 inches
Width
12 inches
Flowers
Summer till frost: reds, pinks, white, coral, bi-colored, salmon
Light
Full sun
Soil
Moist, well-drained
Planting and Care
Space plants 8 to 12 inches apart, deadhead to encourage continual bloom, mulch to keep roots cool.
Geraniums can be wintered indoors. Take 3 to 4” cuttings and root the in moist vermiculite or a well-drained potting mix. I find setting the pot in a plastic bag left open increases the humidity to encourage rooting without leading to rot. Once rooted, they can be moved to their permanent container, placed in a sunny location and grow as a houseplant.
You can also bring the whole plant indoors and raise it like a houseplant. Grow in a bright, sunny window or under artificial lights and keep the soil moist. Don't be alarmed if the plant drops most of its leaves. It will soon send out new leaves more suited for its indoor location.
A third, but less successful method for overwintering geranium, is dormant storage. Place plants in a cool dark location for winter. In spring place them in a warm, sunny location. Prune back to four inches, water and wait to fertilize until new growth appears.
Problems
Varieties to Consider
'Black Magic' Series - chocolate colored leaves
'Bulls Eye' - dark green with light green edged leaves, 14-16"
Ivy Geranium - P. odoratissiumum
Scented Geraniums - P. odoratissimum, P. graveolens, P. tomentosum
Regal or Martha Washington - P. domesticum
Astilbe
Dryopteris erythrosora
Musa
Epimedium 
Geranium macrorrhizum
Geranium sanguineum
Ajuga reptans
Ricinus communis
Houttuynia cordata
Solenostemon scutellarioides
Heuchera sanguinea
Geranium himalayense
Lamium maculatum
Colocasia
Fagus sylvatica
Dicentra eximia
Pelargonium
Should I deadhead and cut back my cranesbill geranium once it is done blooming. The leaves often look spotted and unsightly?
I thought perennial geraniums were hardy plants without any pests or diseases. Not mine. The leaves turn yellow, then curl up to a crisp brown. I have tried just about everything, including all sorts of fungus and disease sprays. I’ve been told to destroy them because I have something called “southern virus.” Is there anything I can do to prevent this from happening again?
I have two large pots of geraniums that I brought into the house before frost and now have them in our sunroom. What is the best way to preserve these so I may take them outside again in spring? Do I treat them as a houseplant, prune back, store in a cool dark place? I have heard various options.
Ginkgo biloba
Hakonechloa macra
Tulipa greigii
Hosta
Acer palmatum
Athyrium nipponicum
Alchemilla mollis
Stachys byzantina
Geranium pratense
Lysimachia nummularia
I am trying to overwinter one of my outdoor container gardens indoors. It is filled with sweet potato vines and geraniums. The plants do not look so good. Should I fertilize?
Hypoestes phyllostachya
Pelargonium graveolens
Salvia officinalis
I recently heard you speak and you showed a picture of a large silvery leafed salvia. In fact you said it looked like lamb’s ear on steroids. What is the name and will it grow here.
Sedum
Artemisia schmidtiana 
Panicum virgatum
Rhus typhina 'Bailtiger'
Populus alba
Yucca filamentosa
