Catnip

Catnip is a vigorous, spreading perennial in the mint family that grows 60-100cm tall with grey-green, heart-shaped leaves and spikes of small white or pale lavender flowers. Plant in full sun to partial shade in average, well-drained soil. Space plants 45cm apart. Catnip is extremely hardy and adaptable, thriving in poor soils and dry conditions where many herbs struggle.

The biggest challenge in growing catnip is protecting young plants from neighborhood cats, who will roll on, crush, and destroy seedlings. Use wire cages or chicken wire domes over newly planted specimens until they are well-established with a strong root system. Once mature, plants can tolerate enthusiastic feline attention and regrow from the roots even if heavily damaged.

Cut plants back by half after the first flowering flush to promote bushier regrowth and a second bloom period. Catnip self-seeds prolifically and can become weedy if flowers are left to set seed. Deadhead regularly or cut entire flower spikes for drying. Divide mature clumps every 3-4 years in spring to rejuvenate plants and control spread.

Catnip (Nepeta cataria) is native to southern and eastern Europe, the Middle East, Central Asia, and parts of China, where it grows wild along roadsides, hedgerows, field margins, and disturbed ground. It thrives in well-drained, moderately fertile soils and has adapted to a wide range of conditions from dry Mediterranean slopes to the cooler temperate regions of northern Europe. The genus name Nepeta is believed to derive from the ancient Etruscan city of Nepete (modern Nepi) in central Italy, where the plant reportedly grew in abundance. Catnip has been used by humans for at least two thousand years, with some of the earliest documented references appearing in Roman texts describing its use as a culinary and medicinal herb. The species name cataria reflects its long-observed association with cats, a relationship that has fascinated naturalists since antiquity. Throughout the medieval period, catnip was a staple of European monastery and cottage herb gardens. It was valued primarily as a soothing tea for digestive complaints, fevers, colds, and nervous tension. English herbalist John Gerard wrote in his 1597 Herball that catnip was useful for settling the stomach and easing headaches. Nicholas Culpeper, the influential 17th-century herbalist, similarly recommended it for a variety of ailments and noted its powerful attraction to cats. European settlers brought catnip to North America in the 18th century, where it quickly naturalized and spread across the continent. Native American communities adopted the herb, using it as a tea for infant colic and as a mild sedative. By the 19th century, catnip had become one of the most commonly used home remedy herbs in both Europe and North America. Today, catnip is cultivated commercially for the herbal tea market, the pet industry, and as a companion plant in organic gardens, where its insect-repelling properties make it a valuable ally for chemical-free pest management.

Catnip thrives in average to poor, well-drained soil with a pH of 6.0-7.5. It actually produces stronger essential oils in leaner soils—rich feeding reduces aromatic potency. Sandy loam is ideal. Avoid heavy clay unless amended with grit for drainage. No fertilizer is typically needed; a light compost top-dressing in spring is more than sufficient. Excess fertility leads to lush but weakly aromatic growth.

Harvest catnip leaves and flowering tops when flowers are in full bloom, typically June through September. This is when nepetalactone content is highest. Cut stems about 15cm above ground level, leaving lower growth for recovery. For cat toys, dry the most aromatic top growth. For tea, younger leaves near the stem tips have the most pleasant flavor. Harvest in the morning after dew has dried for the strongest fragrance.

Bundle stems and hang upside down in a warm, dark, well-ventilated space. Dried catnip retains its potency for up to a year when stored in airtight containers away from light. For cat toys, stuff dried leaves into small fabric pouches. For tea, strip dried leaves from stems and store in glass jars. Fresh catnip can be frozen in sealed bags. The essential oil can be extracted by steam distillation for use as a natural insect repellent.

Catnip makes a pleasant, mildly minty herbal tea with gentle calming properties. The lemon-scented variety (Citriodora) is especially nice for tea, either hot or iced. Young leaves can be added sparingly to salads or used as a garnish. The tea has traditionally been used as a mild sedative and digestive aid before bedtime. Combine with chamomile and honey for a soothing evening beverage.