Geraniums are a beloved flower among gardeners for their vibrant colors, fragrant foliage, and resilience to different weather conditions. In New Hampshire, the climate can be somewhat challenging for growing certain plants, but geraniums prove themselves as a versatile choice. This guide will provide comprehensive insights on how to successfully cultivate geraniums in the Granite State.
Before diving into the specifics of growing geraniums in New Hampshire, it’s essential to understand the different types of geraniums available. The most common varieties include:
Each type has its unique care requirements, but all thrive with proper attention.
New Hampshire experiences a humid continental climate, which means cold winters and warm summers. The average temperature can range from 20°F (-6°C) in winter to around 80°F (27°C) in summer. Understanding these climatic conditions will help you create an optimal environment for your geraniums.
Temperature: Geraniums prefer daytime temperatures between 70°F to 75°F (21°C to 24°C). Nights should be cooler but not below 50°F (10°C). Protect them from frost, which can occur late in spring or early in autumn.
Sunlight: These flowers thrive in bright sunlight. Aim for at least six hours of direct sunlight daily. If you notice the leaves turning yellow or the plant becoming leggy, it may not be receiving enough light.
Soil: Well-draining soil is crucial for healthy geranium growth. A mix of potting soil with perlite or sand works well. The pH level should be slightly acidic to neutral (6.0 – 7.0).
Watering: While geraniums prefer moist conditions, overwatering can lead to root rot. Allow the top inch of soil to dry out before watering again. In hotter months, you may need to water more frequently.
You can start growing geraniums either from seeds or cuttings.
Timing: Start seeds indoors about 8-10 weeks before the last expected frost date in your area.
Planting: Fill seed trays or pots with seed-starting mix, plant the seeds about a quarter-inch deep, and keep the soil slightly moist.
Germination: Place the trays in a warm area with plenty of light. Germination typically takes 14-21 days.
Transplanting: Once seedlings form true leaves and are strong enough to handle, transplant them into larger pots before moving them outside after the last frost.
Timing: Take cuttings in late spring or early summer when plants are actively growing.
Selection: Choose healthy stems that are about 4-6 inches long and remove lower leaves.
Rooting: Place cuttings in a glass of water or directly in a potting mix with good drainage. Roots should develop within two weeks.
Transplanting: Once rooted, follow similar steps as with seedlings for outdoor planting.
When the danger of frost has passed and nighttime temperatures consistently stay above 50°F (10°C), you can move your geraniums outdoors.
Select a sunny spot with well-draining soil for your geraniums. They can be planted directly in garden beds or in containers if space is limited.
Arrange them according to their height and color to create visually appealing displays.
Prepare the soil by tilling it and mixing in compost or well-rotted manure.
Dig holes that are slightly larger than the root ball of each plant.
Place each plant into its hole, ensuring that the top of the root ball is level with the soil surface.
Water thoroughly after planting to help settle the soil around the roots.
Once planted, ongoing care will ensure your geraniums thrive throughout the growing season.
Water deeply but less frequently to encourage deep rooting. During heatwaves or prolonged dry spells, increase watering frequency while monitoring soil moisture levels closely.
Every four to six weeks during the growing season, apply a balanced liquid fertilizer diluted by half strength—this will promote blooming and healthy growth without overwhelming the plants with nutrients.
To keep your geraniums looking their best:
Geraniums are generally resistant to pests; however, aphids and spider mites may occasionally appear:
In New Hampshire’s cold winters, it’s essential to protect your geraniums:
Bringing Indoors: If you’re growing them in pots, bring them indoors before frost arrives; place them near a bright window.
Cut Back Plants: If planting directly in garden beds, consider cutting back plants after they die back in fall while leaving some stems intact for potential regrowth in spring.
Mulching: Apply mulch around base plants if left outdoors—it helps insulate roots against freezing temperatures but remove it once spring arrives.
Growing geraniums in New Hampshire is entirely achievable with proper planning and care strategies tailored to local climatic conditions. By understanding their needs regarding sunlight, temperature, watering, soil drainage, and protection against pests and winter conditions, gardeners can enjoy these colorful blooms throughout much of the year.
As you embark on your gardening journey this season, remember that patience and attention will yield beautiful results—transforming your outdoor spaces into vibrant displays of color with stunning geranium blossoms!