Nierembergia sp.

This excellent ground cover plant has early, bright blooms of blue-violet or dark purple. The mounding foliage has a fern-like appearance, is vigorous, and free-flowering all summer long.

The Cup Flower plant is considered a perennial in zones 7 - 10 but it can be grown as an annual in cooler zones.

Nigella sp.

Nigella is an annual flowering plant with finely divided, linear leaves. The flowers are delicate, and usually colored pale blue and white, with 5-10 petals. The fruit is a large and inflated capsule composed of 3-7 united follicles, each containing numerous seeds. The seeds of N. sativa, known as Black Cumin, onion seed or just nigella are used both as a condiment in bread and cakes and various confections and like pepper or combined with pepper such as cayenne in sauces. According to an Arab Proverb it is said that, 'in the black seed is the medicine for every disease except death.'

Nigella damascena has been grown in English cottage gardens since Elizabethan times, commonly called Love-in-a-mist.

Nivenia binata

Nivenia binata, also known as Nivenia, is a large shrub or small tree native to South Africa. It is an evergreen shrub that grows to a height of 5-10 ft tall with a dense, bushy growth habit. Its thick leaves are sword-shaped and arranged in a fan, giving the shrub an attractive, feathery appearance. The foliage is dark green and glossy, with the undersides a silvery-gray.

Nivenia grows best in full sun, and requires moderate amounts of water for optimal growth. In cooler climates, the shrub does best in a container, where it can be brought indoors during winter. It is hardy in USDA Zones 9-11.

The shrub produces a profusion of small, tubular-shaped flowers in shades of blue, lavender, and purple, which are borne in clusters along the stems. The blooms are borne in late winter and early spring, and they attract a wide variety of pollinating insects. In summer and fall, the plant produces small berries, which are favored by birds.

In areas where Nivenia is hardy, it is easy to grow. In colder areas, however, the plant should be kept in a container and brought indoors during winter. The soil should be well-drained but moist, and fertilized lightly once a year. Prune back the shrub in late winter or early spring to maintain a neat, compact shape. It is also necessary to deadhead spent flowers to encourage new blooms.

Nymphaea sp.

USDA Plant Hardiness Zone Map

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Water lilies make an excellent addition to the water garden or a pond. Nymphaea sp. (Water Lily) is a stunning and versatile plant that can create a beautiful addition to any garden. It has large, rounded leaves and gorgeous flower borne on long petioles, which often reach to the surface of the water. There are many hybrid varieties, ranging in color from pink, white, off-white, blue, lavender, purple, red, crimson, vinous, and yellow to orange.

The Water Lily is an ethnomedical plant that is easy to grow and maintain. It prefers full sun and bog or aquatic conditions. Generally, Water Lilies do best when planted in USDA Hardiness Zone 4-10. For colder climates, they can be grown in a pot in a heated environment, such as a greenhouse or conservatory.

Water Lilies will thrive when planted in nutrient-rich soil. It is important to ensure that the container is both small and shallow, as the plant will quickly outgrow the pot. The soil should be kept moist but not wet, and fertilized with a specific aquatic fertilizer once per month. As with any plant, make sure to prune regularly and trim off dead leaves and stems, which will help keep the plant healthy.

Nymphaea sp. (Water Lilies) are an attractive and practical addition to any garden, making them a great choice for any landscape. With beautiful and vibrant colors and an ability to tolerate flooding, these plants are both beautiful and hardy. With the right care, they will produce beautiful blooms that will last for many years.

Ocimum carnosum