For spring flowering plants, geranium seeds should be sown in early- to mid-February.
For many years, geraniums have been a common choice for bedding plants. Cuttings are a frequent way to grow plants. Geraniums can, however, also be raised from seeds. Hybrid geraniums that are grown from seeds have great vigor, heat tolerance, disease resistance, and free blooming.
Growing geraniums from seeds is not too difficult. Geranium seedlings, however, develop slowly. For spring flowering plants, geranium seeds should be sown in early- to mid-February. Approximately 13 to 15 weeks after seeding, flowers begin to bloom. Geraniums from the Elite, Orbit, Maverick, and Multibloom Series are recommended for Iowa. A series is a collection of closely related types that share similar traits like height, spread, and flowering behavior. The only trait that typically varies within a series is the color of the flowers.
Jiffy Mix and Redi-earth are two great soilless mixtures that work well as germination media. Geranium seedling damping-off can be a significant issue during germination. Different species of fungi attack the seedlings and kill them, which is what causes damping-off. Containers used to start seeds should be spotless and have sufficient drainage to deter this. Prior to disinfection, previously used containers should be cleaned in soapy water and dipped into a solution of one part chlorine bleach to nine parts water.
The germination media should be poured into the container to within 1/2 to 1 inch of the top. Lightly firm the medium, completely wet it, and then give it some time to drain. Rows of seeds should be 2 to 3 inches apart, and the medium should cover the seeds by about 1/8 inch. After planting, thoroughly hydrate the soil by immersing the container in water only partially. Remove the container from the water after the surface is damp, then let it drain. The media can alternatively be hydrated with a gentle water spray from a sprinkler made of a rubber bulb or a similar tool.
Use clear plastic food wrap or a clear plastic dome to cover the container to maintain a constant moisture level during the germination process. Place the container in a well-lit area away from the sun. If the covered container is placed in the direct sun, there could be an excessive accumulation of heat. When germination is taking place, the medium’s temperature should be between 70 and 75 degrees F. The seeds should start to sprout in seven to ten days at the right temperature and moisture content.
As soon as the seeds start to germinate, remove the plastic covering. Put the seedlings in a window with natural light or under a light fixture. Fluorescent lights should be turned on for 12 to 16 hours a day and placed no higher than 4 to 6 inches above the seedlings. When the seedlings develop their first true set of leaves, transplant them into separate containers using a well-drained commercial potting mix. Handle the little seedlings by their leaves since the fragile, delicate stems are easy to break. When transplanting, place seedlings at the base of the seed leaves (cotyledons).
Grow seedlings under fluorescent lights for the greatest outcomes. One 40-watt cool white and one 40-watt warm white fluorescent tube can be used in a conventional fluorescent shop light. Due to little light, plants grown in windows frequently grow tall and spindly. Geraniums prefer daytime temperatures of 70 to 75 degrees and nighttime temperatures of 60 to 65 degrees. When the soil surface is completely dry to the touch, water the geraniums thoroughly. Fertilization is probably not required if using a potting mix that is sold commercially and has a slow-release fertilizer. For potting mixes without a slow-release fertilizer, applying a diluted fertilizer solution once every two weeks should be adequate.
Before putting the plants in the garden, harden or acclimatize them to the outdoors for seven to 10 days. First, plant the geraniums in a sheltered, shaded area. Then progressively subject the plants to extended sun exposure times. When there is no longer a chance of a frost, plant the geraniums outside. Early May is typically a good time to grow geraniums outside in central Iowa.
When should geraniums be planted?
Wish your life had a little more carefree beauty? Plant some geraniums, maybe. Geraniums are beautiful and low-maintenance plants that belong in planters, planting beds, and perennial borders.
Geraniums can be divided into two major groups. Zonal, fancy-leaf, ivy, perfumed, and Martha Washington (or regal) varieties of annual geraniums (Pelargonium species), which often only live for a year, are some examples. Perennial geraniums (Geranium species), which bloom continually from spring to summer, combine striking foliage with attractive blooms that emerge intermittently or continuously.
Where to Plant Geraniums
You must be aware of the type of geraniums you have in order to select the ideal planting location. With the exception of the ivy geranium, which thrives in mild shade, most annual geraniums require a location in full sun. On the other hand, depending on the variety, perennial geraniums can grow in either sunlight or shade. In the country’s southern and western regions, both types profit from shielding from the sun during the warmest time of the day.
What Kind of Soil to Use for Geraniums
Geraniums grow best in healthy, well-draining soil, which is ideal for both perennial and annual geraniums. Improve soil drainage and quality when growing geraniums in planting beds by adding 3 inches of Miracle-Gro Garden Soil for Flowers to the top 6 to 8 inches of native soil. When growing geraniums in pots, Miracle-Gro Potting Mix should be used because it is light and fluffy. When planting geraniums in raised beds, mix equal parts garden soil and potting mix for just the right medium, or fill beds with Miracle-Gro Raised Bed Soil.
How to Plant Geraniums
Starting with young plants, such as the premium geraniums from the Miracle-Gro Brilliant Blooms collection*, is ideal (and simplest). Geraniums, both annual and perennial, benefit from warmth, so postpone planting in the spring until all risk of frost has passed. Once the summer heat subsides in the fall, you can also plant perennial geraniums. Try planting perennial geraniums from late fall to early spring in areas with mild winters.
Geraniums range in height from 4 to 48 inches tall and 6 to 36 inches wide, depending on the variety. For information on the recommended spacing for your type of geranium, consult plant tags. Use a pot that is at least 10 inches across for annual geraniums or at least 12 inches across for perennial geraniums when planting geraniums in pots.
Geraniums should be watered thoroughly after planting, giving the root ball and surrounding soil time to absorb the water.
How to Water Geraniums
Check the soil once a week for annual geraniums, and water when the top inch is dry. During their initial growth season, keep newly planted perennial geraniums in continuously moist soil. With the exception of periods of extreme drought, perennial geraniums can typically thrive on rainfall after they are established.
How to Mulch Geraniums
After planting geraniums, cover the area with a 2- to 3-inch layer of mulch to help keep the soil moist and to prevent weed growth and sun exposure. Use Scotts bagged mulch, chopped leaves, pine straw, or another material that is easily obtainable in your area.
How to Feed Geraniums
Your plants receive an excellent starting dosage of nutrients when you start with rich, nutrient-rich soil. However, you should also feed them frequently all season long for maximum results. Apply Miracle-Gro Shake ‘n Feed Rose & Bloom Plant Food to your geraniums a month after planting to give them the extra boost of nutrition they require for magnificent blooms. Make sure you adhere to label directions.
How to Grow Perennial Geraniums
Even in the coldest climates, perennial geraniums don’t require particular care to survive the winter. After the initial flower flush, cutting perennial geraniums back by around one-third can encourage more blooms. Cut stems back as necessary if hardy geraniums like “Rozanne” or “Pink Penny” spread out too quickly and widely. These vining geraniums can have up to two-thirds of their length removed, and the plants will still grow back. To encourage new growth and prevent wilted leaves, prune cranesbill geraniums to 2 to 4 inches height after flowering.
How to Use Geraniums
Annual geraniums are excellent at stealing the show in planters and flowerbeds. Regal geraniums can resist cool weather and form lovely hanging basket plants, making them an obvious choice for planting in the early spring. Ivy geraniums are very stunning. Geraniums with aromatic leaves are strong in containers and form a lovely patio display where the leaves may be stroked and enjoyed.
In gardens with some shade, perennial geraniums add much-needed color and can thrive next to mature trees. While mid-size perennial geraniums go well with lanky shrubs, shorter perennial kinds create beautiful ground covers.
Are you prepared to begin cultivating geraniums? To learn more about a product, to buy it online, or to locate a retailer near you, click on any of the product links above.
How long does it take for geraniums to develop from plug plants?
Typically, it takes seven to fourteen days for seeds placed in growth medium to germinate. Geranium plants are slow-growing once they have sprouted, and it will take them 12 to 16 weeks to flower. Geraniums need to be started indoors rather early in order to be prepared for blooming in the spring because of this. Plant your geraniums outdoors three months after sowing the seeds indoors. Geraniums will bloom by April, therefore coastal gardeners with moderate winters may decide to sow seeds in November and plant geraniums in late March.
Can I plant geraniums outside yet?
If you don’t have an indoor room, cover the tray with horticultural fleece and leave it in a protected area of the garden. When your geraniums first arrive, place the tray in a frost-free, light, draught-free environment. Water gently by misting or by standing in a shallow tray of water.
Give the plants 24 hours to relax. If the leaves appear a little yellow or if some compost has separated from the root blocks, don’t be concerned.
Large-sized geraniums can be planted right away as long as the risk of frost has gone, while medium-sized geraniums should be nurtured on for 24 weeks before planting.
- Be sure to water your plants well.
- Push the individual cells up from bottom and out of the tray with your finger or a pencil. Grasp one of the leaves and carefully pull yourself up. Avoid attempting to grip the stem since doing so will seriously harm the plant.
- Create a tiny hole in each 9 cm pot of compost and fill it with the cell (one plant per pot). Make sure the joint where the stem and leaves meet is above the surface of the earth, then gently press the plant into the ground.
- After transplanting, give the plant a gentle watering and place it somewhere warm and out of direct sunshine.
- After a week, feed with a liquid feed and maintain well-hydrated.
- They should be prepared for planting after 24 weeks if you maintain the complete stem exposed and the plug submerged so the top of the plug is level with the soil surface. You can plant them in beds, borders, hanging baskets, or planters. After planting, liberally water the area.
- After planting, if there is even a little chance of frost, cover with fleece for the night to prevent the leaves from turning brown.
Could plug plants be planted directly in the ground?
Plug plants are a fantastic and affordable way to quickly and easily add summer color to your yard.
Although seeds are less expensive to purchase, properly sowing and cultivating them requires the purchase of propagation equipment. Germination can also be hit or miss, and picking out tiny seedlings is a tedious task. Purchasing plug plants allows gardeners the luxury of delegating the more difficult initial stages to the professional grower, who will then take over once the young plants are somewhat more established and are grown until they are ready to be potted up or planted into their final positions, each in its own plug of compost.
The size of the plug plants when you purchase them will determine how much work needs to be done on them and how much you will pay. Smaller animals cost less, but they often require more care.
- The first of the season, mini plugs begin to fill garden centers and nurseries in late February. These require the most care and consideration as they grow in trays or pots. Before planting out ready to flower, they must be transplanted and nurtured on a windowsill, in a greenhouse, or in a conservatory.
- The next step is standard plugs, which need to be potted and grown on for about a month if you want filler plants for beds and containers.
- Garden-ready plug plants are often healthy, established plants in pots that can be planted right away in their ultimate location in the garden. However, these plants may also benefit from being grown on for a few weeks in a large pot to give them time to develop more robust roots.
As soon as possible after purchasing, plug plants should be transplanted into larger pots or trays.
Just moisten your plants with water. The best way to accomplish this is to submerge them in water and let their roots absorb it.
Make a hole in the center of a tiny pot or seed tray with good quality, freely draining multipurpose compost that is roughly the same size as the plug plant. Pinch the plug’s bottom gently and push upward while holding it by the leaves. Place the root ball in the hole, making sure the stem is level with the surrounding compost as it was previously, and lightly compact the compost to seal the plug.
Water the newly planted plants gently, letting any extra water drain away. Put them in a place that is well-ventilated, well-lit, and somewhat warm, such a greenhouse or windowsill. Feed them a balanced liquid feed at 23 weeks, and then do it again every 10 to 14 days.
You can harden off your plants so they are ready to be planted outdoors once they are strong and well-grown. This only entails leaving them outside in a protected area during the day and bringing them inside at night to acclimate them to lower outdoor temperatures for a week or two. Keep them inside until the winter weather passes if the temperature falls below 5 C.
Your plugs should be prepared for planting out into their final position once the plants have established strong roots in the compost and the risk of frost has gone. One to two hours before planting, as well as once they are in place, give them a good soak. After planting, make sure to water frequently, especially during dry, sunny days.
Do geraniums grow better in the ground or in pots?
Geraniums can be planted in any type of garden soil, but they thrive in neutral or alkaline soil. Grow in flower beds, hanging baskets, or containers that receive direct sunlight.
How to plant geraniums
Choose a peat-free multi-purpose compost with extra slow-release fertilizer when growing geraniums in containers. When paired with other summer bedding plants, geraniums look amazing. They may endure being packed closely together with other sensitive plants if planted in a rich compost and kept well-watered.
Here, Monty Don shows how to grow lavender and pelargoniums in pots for a lovely display: