Scented-leaved geraniums reward a touch with a burst of fragrance, from rose and lemon to mint, apple, and nutmeg, depending on the variety. These plants belong to the Pelargonium genus and sit in the same group as the familiar garden geraniums, but their foliage, not their flowers, is the main event. Rose-scented types are the most common, yet the genus also offers citrus, spice, and fruit fragrances that suit teas, baking, and potpourri alike. Like dahlias, they are tender perennials that most gardeners treat as annuals or move indoors for winter, and the same site, soil, and seasonal care that keeps dahlias thriving applies to scented geraniums.
Understand Scented-Leaved Geraniums
The plants we call garden geraniums were once part of the Geranium genus, but after botanists moved them into their own Pelargonium genus in 1789, the common name stuck. Scented-leaved geraniums are the Pelargonium species whose leaves carry fragrant oil, and the group also includes ivy, zonal, and Martha Washington geraniums. True cranesbill geraniums are a separate genus entirely. Most growers buy young plants, but starting from seed works too, and the growing geraniums from seed schedule of timing, temperatures, and transplant steps is different from bedding annuals.
Pelargonium Versus True Geraniums
Cranesbill geraniums, the plants with the rightful claim to the Geranium name, are hardy perennials used in borders and rock gardens. Pelargoniums are tender and frost-sensitive. Knowing which one you are buying matters for winter survival and for how the plant behaves in a pot. Garden centers sometimes file scented geraniums under herbs rather than annuals, so check the label for the Pelargonium genus name and a frost-tender note before buying.
How the Scent Works
The fragrance comes from glands at the base of the leaf hairs, where the scented oil forms. Crushing the leaves, or in some cases merely touching them, releases the oil into the air. Each species carries its own signature: Pelargonium graveolens smells of rose, P. crispum of lemon, and P. tomentosum of peppermint, with apple, nutmeg, and orange varieties filling out the range.
Oil Glands at the Leaf Base
Rub a leaf between your fingers and the scent is strongest right at the crushed surface. Oil content varies by species; rose-scented types such as Pelargonium graveolens are among the strongest, while some citrus and mint types need a firmer crush to release their scent.
Choose Containers and Potting Mix
Scented geraniums ask for little in the way of watering and feeding, but they are particular about drainage. Choose a pot with drainage holes and a mix that dries quickly between waterings. Terracotta is a classic choice, and its behavior has a lot in common with clay masonry: fired clay absorbs moisture, and the expansion of clay as it takes on moisture is why terracotta can craze or crack over years of wet-dry cycles.
Clay, Plastic, and Fabric Pots
- Terracotta wicks moisture and lets roots breathe, but it dries fast.
- Plastic holds moisture longer and weighs less.
- Fabric pots air-prune roots and drain freely.
- Glazed ceramic looks good but needs careful watering.
| Container | Drainage | Water needs | Best for |
|---|---|---|---|
| Terracotta | Excellent | Frequent | Experienced growers |
| Plastic | Good | Moderate | Beginners, hot rooms |
| Fabric | Excellent | Frequent | Patio and balcony |
| Glazed ceramic | Good | Moderate | Display plants |
Potting Mix That Drains
Use a well-drained potting mix amended with perlite or coarse sand. Garden soil compacts in containers and holds water around the roots, so keep it out of pots. A simple recipe is two parts commercial potting mix to one part perlite. Water sitting in the saucer is the fastest way to kill these plants, so empty saucers after each watering. Repot when roots fill the container, usually every 1 to 2 years, moving up one pot size at a time.
Place Plants in Bright Kitchens and Windows
Scented geraniums want light, and lots of it. Give them at least 6 hours of sun a day, ideally from a south- or east-facing window. Kitchens are natural homes for these plants because the leaves are handy for cooking, and a kitchen remodel designed for a growing family often adds a deep windowsill or herb shelf that suits potted geraniums perfectly.
Where Geraniums Thrive Indoors
- South-facing windowsills with direct sun
- East windows with strong morning light
- Sunrooms and bright enclosed porches
- Shelves fitted with grow lights
If you only have a north window, expect slower growth and weaker scent. Grow lights close the gap, and a basic LED panel is enough to keep a small collection healthy through winter.
Culinary Uses for Scented Leaves
Lemon and rose types flavor teas, syrups, and baked goods; mint and apple types suit fruit salads and punches. Use leaves fresh, because the oils fade quickly after harvest, and dry the surplus for potpourri. Leaves infuse sugar, honey, and simple syrup in a few hours, which is an easy way to add rose or lemon flavor to desserts without extracts. Scented leaves also make a fragrant garnish for summer drinks.
Match Light and Heat to the Seasons
These are sun lovers. In summer, move pots outdoors to a full-sun spot and they will bush out and bloom. The same south-facing exposure that drives the growing residential solar market is exactly where potted geraniums do their best, because they flower and hold scent on direct light.
Summer Sun and Heat
Move plants outside after the last frost, once nights stay above 50 F. Acclimate them gradually over a week so leaves do not scorch. Full sun grows the densest foliage and the strongest scent; afternoon shade is acceptable in hot climates but will slow blooming. In very hot regions, a spot with morning sun and afternoon shade keeps leaves from crisping while still giving the plant enough light to flower.
Indoor Light in Winter
Winter sun is weaker indoors. Put plants in the brightest window you have and rotate the pots weekly so stems grow straight. If leaves stretch and fade, add a grow light for 12 to 14 hours a day until spring. Temperatures between 65 and 75 F suit these plants; cool nights down to about 55 F are fine, but sudden cold drafts stress the leaves.
Water, Feed, and Overwinter
Watering is where most potted geranium problems start. Let the top inch of soil dry before watering again, then water thoroughly until it runs from the drainage holes. These plants tolerate drought far better than wet feet. For gardeners in compact apartments and green live-work units, a single potted geranium on a sunny sill is a low-maintenance way to keep greenery year-round.
Watering Rules
Check the soil with a finger before watering. Cut back sharply in winter, when growth slows. Yellow lower leaves usually mean too much water; wilted, crispy leaves mean too little. Use room-temperature water, and lift the pot to feel its weight, because a light pot is a dry pot.
Fertilizer Strategy
Feed lightly. A balanced liquid fertilizer at half strength every 2 to 4 weeks during active growth is plenty. High-nitrogen feeds push out leaves at the expense of scent and bloom, so resist the urge to pour on more.
Overwintering Indoors
Before the first frost, bring pots inside. Cut plants back by about one-third, inspect for pests, and place them in a bright, cool room. Water sparingly through winter so the plants rest instead of pushing weak growth. Plants that spent summer outdoors should be checked for slugs and hitchhiking insects before they share space with houseplants.
Prune, Propagate, and Troubleshoot
Regular pinching keeps plants bushy, and cuttings give you more plants for free. Pests are few when conditions are right, but whiteflies, aphids, and spider mites show up on stressed plants. Balcony and patio gardeners in new mixed-use developments can grow scented geraniums in containers without a yard at all.
Pinch and Prune for Bushy Growth
Pinch stem tips when plants are young to force branching. Remove spent flowers and yellow leaves as they appear. Cut leggy stems back to a leaf node, and the plant responds with two new shoots. Stop pinching about 6 weeks before you want flowers, because buds form at the stem tips.
Propagate From Cuttings
- Cut a 3 to 4 inch stem tip below a leaf node.
- Strip the lower leaves from the stem.
- Dip the cut end in rooting hormone, optional.
- Insert the cutting into moist potting mix.
- Keep it bright but out of direct sun until roots form.
- Pot up rooted cuttings in 4 to 6 weeks.
Common Pests and Problems
- Whiteflies: yellow sticky traps and a soap spray.
- Aphids: rinse with water or spray insecticidal soap.
- Spider mites: raise humidity and rinse the foliage.
- Leggy growth: more light and a pinch.
- Root rot: less water and a faster-draining mix.