Planter Geraniums


Planter geraniums are attractive to hanging baskets and window boxes and are easy to grow in containers as they do not require constantly moist soil.

Geraniums can be started from seed or stem cuttings. Growing them from seeds requires patience, as it can take 12-16 weeks to mature into flowering plants.


Geraniums are beloved annual varieties that add vibrancy and charm to containers, hanging baskets, and window boxes. Geraniums can quickly be grown from seeds or transplants and work well alongside other flowering annuals like lobelia, vinca vine, and verbena for vibrant displays in containers, hanging baskets, or window boxes. Geraniums add drama when mixed into plantings with shrubs or trees like junipers or evergreen holly oaks for dramatic combinations.

Seeds should always be started indoors – never directly into the soil outdoors! Seeds typically germinate within seven to ten days and take three to four months before flowering appears – depending on which variety of geranium seed you select, so pay close attention to the instructions on its packet. Cuttings are another great way of propagating favorite varieties; ensure that only healthy parent plants are used since cuttings may not root as readily if stressed ones have been born from.

Annual geraniums thrive in almost any soil, though loam-based compost like John Innes formula mixes are especially suited to their growth. Full sun is required; otherwise, they will become leggy and less compact. Regular fertilization with dilute solutions of water-soluble feed will promote strong and vigorous growth.

Certain geranium varieties have scented flowers that can serve as “filler” plants in mixed containers to improve their overall appearance and enhance displays. They should typically be placed around the edges and back or in front of “Thriller” container selections.

Hardy geraniums (Pelargonium) are low-growing perennials that add color and depth to garden beds and borders. In zones 3-8, these perennials thrive best with full sun or partial shade conditions. They have more vibrant flower colors than their annual counterparts, making them great companions with other low-growing bedding plants like violas, irises, and nemeses. Once established, they require plenty of sun, rich soil conditions, regular feeding schedules, and deadheading to encourage further blooming cycles and extend blooming times further.


Zonal geraniums are hardy perennial plants in USDA zones 3-9 that can survive as perennials with proper sheltering during the winter season. Indoors, they make great houseplants during this season or are used as window boxes, hanging baskets, and tall planters houseplants during this period. With many flower colors and leaf types, zonal geraniums typically bloom best under full sunlight but can also tolerate partial shade. They require very minimal care!

Plant pelargoniums from seed or cuttings to propagate new plants. Use coarse rooting media like sand, perlite, or vermiculite, or use sterile commercial mixes; remove leaves from one-half of each stem before dipping it in rooting hormone and placing them three-fourths to one and one-half inches deep into your chosen medium – then firm around them and water well! A light dusting of horticultural sphagnum moss will add moisture retention and nutrients.

Fertilize geraniums regularly with general-purpose liquid or granular fertilizer and remove any spent flowers to encourage more blooms. Plant pelargoniums in large containers for groupings or smaller pots with single plants for filling space. Amend their well-drained soil with organic matter-rich compost for best results, water regularly during hot weather, and inspect for signs of rot in the ground.

If your garden site features rocks or clay soil, try planting Cranberry Geraniums as groundcover-type beds with low to medium shade. These native geraniums produce dense mats of ferny green foliage with pinkish to reddish shades that transition to light purple hues, featuring beautiful pink blooms with striking blotches of darker colors reminiscent of woodland blooms. They also make great companion plants for Ferns, Hostas, and Coral Bells!

Blizzard and Cascade series and Focus series plants thrive as bedding plants in summer bedding arrangements or as mixed annual and perennial flowers, and the Grandirosa series makes an excellent selection for hanging baskets in any climate, including South Texas.

Companion Planting

Geraniums make an outstanding garden flower, yet truly shine when combined with other flowers, vegetables, or herbs. There are hundreds of species and named cultivars of geranium available, providing gardeners with plenty of choices when selecting compatible companion plants – some suitable ones include arugula, marigolds, nasturtiums, and chives with aromatic oils to repel pests such as aphids, cabbage worms, or carrot flies that might attack it.

Basil is an ideal companion plant for geraniums, enhancing their flavor, helping keep soil healthy, and improving its vigor – significant in container-grown varieties that need light soil with a well-draining mix to thrive. Rosemary makes an attractive companion plant as its fragrant scent serves as a deterrent against mosquitoes while simultaneously heightening tomato, pepper, and other vegetable flavors.

Sage and thyme also attract honeybees and other beneficial insects that aid geraniums to pollinate more efficiently while repelling cabbage worms and carrot flies from pollination efforts. Both perennial herbs offer ample benefits when planted as perennial herbs in your garden.

Chives offer multiple advantages to any garden but are particularly beneficial in geranium gardens. Their flavorful leaves and stems enhance both leaves and roots and can be used in many of the same recipes as onions or garlic. Their strong fragrance deters cabbage white butterflies, Japanese beetles, carrot flies, and rose chafer beetles from damaging your garden!

Geraniums make great additions to a “Three Sisters” garden, an iconic vegetable planting method, serving as companion plants to beans, corn, and squash. Their natural trellises for beans and peas provide shade from shorter crops while simultaneously suppressing weeds, not to mention adding some vibrant color during the early phases of garden plot planting or container gardening! Likewise, they pair nicely with taller veggies like sweet potato vines, preventing powdery mildew in shaded areas.

Container Care

Geraniums make beautiful container additions, adding vibrant blooms that enhance most planters. When selecting your container for use with planter geraniums, ensure it can support its root ball while leaving room for additional plants. We recommend calling Calloway’s Organic Container Potting Soil home.

Planter geraniums require at least six to eight hours of full sun each day to flourish, so place them in sunny spots such as south-facing walls and patio tabletops. When temperatures become exceptionally hot, move your planter geraniums to a shaded location to reduce their exposure and promote blooming.

If you reside in a frost zone, protect planter geraniums when temperatures drop and store them indoors for winter. Give your plants only minimal care during this period: water sparingly and fertilize sparsely as necessary before repotting with regular potting soil in spring when frost risk has passed. Finally, when the frost has subsided completely, gently return them outside when sun exposure returns.

Check the soil in your geranium planters for signs of dryness or oversaturation, such as cracking or moisture loss. Too dry soil could lose its ability to retain water or nutrients as effectively; adding one cup of compost per pot to enrich and promote drainage can be helpful, and adding a pinch of peat moss, which also retains moisture to avoid overwatering.

Maintain the health of your geraniums by regularly inspecting for bugs and diseases, such as leaf spots (a fungal condition causing yellowed leaves with webs attached) and spider mites, tiny insects that cause parched or shriveled leaves as well as tiny black dots on their surfaces – both can be treated using fungicide.

Alternatively, purchase garden-ready plants at your local greenhouse or nursery to ensure your geraniums remain outdoors longer. These have been grown indoors in an enclosed environment and can easily be moved outdoors once temperatures warm up and your planter is suitable. When transitioning your geraniums outdoors gradually over several days or so. Remember to water and fertilize as usual throughout summer.