How to Grow Geraniums
wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To create this article, 21 people, some anonymous, worked to edit and improve it over time.
This article has been viewed 454,324 times.
Geraniums grow in riotous reds, pretty pinks, wondrous whites, passionate purples. the list goes on. Needless to say, they are the perfect addition to any garden, windowsill, or pot. With a little knowledge, you can grow and care for your own beautiful geraniums.
- If you live in an area that is really hot a lot of the year, try to find a spot that gets afternoon shade and has relatively moist soil.
- Avoid placing a saucer under your plant’s pot unless the saucer has pebbles in it.
Pick the right time of year to plant your flowers. The National Gardening Association recommends planting geraniums in spring, after the last hard frost. Depending on the type of geranium, the plant may bloom in midsummer, late summer, or fall, though sometimes the flowers have a mind of their own and they’ll burst into bloom in spring. Regardless, be prepared for their beauty to pop up anytime but winter.
Prepare the garden bed. Geraniums flourish in soil that has been tilled and is loose. Use a tiller or rake to ensure that the soil is loose a good 12 to 15 inches (30.5 to 38.1 cm) down. After loosening the soil, mix in 2 to 4 inches (5.1 to 10.2 cm) of compost to give the soil as much nutrients as possible.
Give each plant enough space to grow. Depending on the type of geranium, you will want to separate each plant by 6 inches (15.2 cm) to 2 feet (0.6 m) in distance. If you have picked up a larger variety of geranium, you will want to give each plant a good 2 feet (0.6 m) of space to grow.
- If you choose to grow your geraniums from seeds, sow them directly into the ground. If you do choose to use seeds, know that your plants will take longer to grow and blossom. If you are sowing seeds in a pot, start your pot off indoors while the seeds take root. Once the seeds begin to sprout, you can move the pot outside. If you need to move the plants outside during harsher weather, then start by leaving them outside during the day when it is warmer and bringing them in at night. This is called “hardening off.”
- Try to avoid putting soil on the stem of the plant, as a buried stem could lead to a rotting plant.
- For geraniums in pots, make sure that you give them enough water. Water the plants until the water runs out the bottom (hence why you need holes in the bottom of your pot.)
Keep the compost flowing. Each spring, you should add a new layer of compost around your geraniums. Place 2 inches (5.1 cm) of mulch on top of this layer of composted soil. The mulch will help to keep the soil moist, and will also reduce the number of weeds brave enough to grow around your geraniums.  X Research source
Keep your plant healthy by removing dead flowers. After the flower has bloomed, remove the dead flowers and parts of the plant so that it can regrow healthy and strong.  X Research source Remove leaves and stalks that have died (they will be brown in color) so that your plant does not grow any fungus (which appears on dead parts of plants.)
Separate your plants every three to four years. Once your plants have grown large (and most likely extended their boundaries a good deal,) you should separate the plants. Divide the plants in late spring. To do this, lift the plants (and their roots) out of the ground, separate the plants by the clumps they have grown around their stems, and replant them.
Fertilize with liquid fertilizer such as 20-20-20.  X Research source Follow the directions on the fertilizer to know how much to use. Try to keep from getting fertilizer on the plant leaves. Repeat the application once every two weeks during active growing seasons.  X Research source
I had the same problem. I stopped watering them for a week and then watered them less regularly and it worked a treat!
Lift the plants from the garden in the fall. Brush off excess dirt from the roots and hang them in a cool cellar. In the spring, cut back the stems 6″ and replant.
There are different types of geraniums. Some are annual flowers, and some are perennials. Therefore, it really depends on which type you get as to how long they will last.
Trim them in the fall. Trim the tops to get them bushy. Trim around the side of the plant to get them taller.
They will die back, but so long as they are well rooted (given at least six weeks to mature in that spot), then they will survive.
Soil that is too dry will cause the yellowing. Remember, the soil should be moist/damp and well-drained. Geraniums do not like wet soil; it can cause root rot, which is the equivalent of drowning the plant. On the other hand, it could be that your plant is too dry. Plants that are too dry will usually turn yellow one leaf at a time as they die off.
Zonal geraniums grow best in rich, well-draining soil that has a pH level of between 5.8 and 6.3, which is slightly less acidic than what other geraniums prefer.
Geranium plants can be rooted. Break off a stem and remove the bottom leaves. Root in rooting medium as you would other cuttings.
Grow geraniums by themselves in containers or mix them in with other plants to make garden containers. Geranium flowers blend well with lots of other plants.
You Might Also Like
About This Article
wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To create this article, 21 people, some anonymous, worked to edit and improve it over time. This article has been viewed 454,324 times.
To grow geraniums, start by finding a spot where the plant will have 5-6 hours of sunlight a day. If you’re using a pot for your geraniums, make sure it has holes in the bottom so the soil doesn’t get too soggy. Then, time your planting for after the last hard frost if you want to plant your flowers outside. Start by tilling your soil so it’s loose, and mix in 2-4 inches of compost to give it as much nutrients as possible. As you plant, space your flowers 6 inches to 2 feet apart, depending on the variety of geranium you’ve picked. For more tips from our Gardening reviewer, including how to prune your geraniums to keep them healthy and strong, keep reading!
How to Grow Geranium
Black Velvet Rose Geranium seeds should be started indoors in early spring. Once the weather warms up in late spring to early summer, and night time temperatures are steadily above 10°C (50°F), the curious little seedlings can be transplanted outdoors. Continue reading below for more tips on how to grow geraniums from seed.
Pelargonium x hortotum
Exposure: Full sun
Start seeds indoors about 6-8 weeks before transplanting out.
Sow seeds 5mm (1/4”) deep, using sterile seed starting mix. Use bottom heat until germination, and continue unless the room is particularly warm. Pot seedlings on into 4” peat or coir pots about 3 weeks after sprouting.
Harden off seedlings gradually over 1 week, once night time temperatures are consistently above 10°C (50°F). Geraniums are fairly hungry feeders that benefit from rich garden soil and regular feeding with liquid fertilizer or compost tea. Grow in full sun to achieve the best foliar colour.