Guide to growing Nasturtium - Perennial Tropaeolum

This section is dedicated to the perennial species of Tropaeolum; here for annual Tropaeolum.

There is a tremendous range in size in Tropaeolum plants, climbers reach up to 3M, whereas non climbing varieties only get as high as 10cm.

Members of perennial Tropaeolum include Nasturtium, Flame Flower and Climbing Nasturtium.

These plants tend to have green or greyey lobed leaves and bloom in the summer.

Tropaeolum flowers are usually red, orange or yellow and trumpet shaped.

How to grow Nasturtium

If growing Nasturtium outdoors then sow the seeds a couple of weeks before you expect the last frost; the seeds should be lightly covered once sown. The spacing is dependent upon the Tropaeolum species, smaller Tropaeolum should be grown about 15cm apart, and larger ones spaced at about 30cm. Nasturtium likes to grow in a sunny area of the garden that has a moist acidic soil.

If starting off indoors then sow the seeds at about the same time as you would outdoors. The Nasturtium germination time is a little unreliable and may take up to two years; it is best to germinate at about 12 to 15 degrees centigrade.

Caring for Nasturtium

Perennial Tropaeolum such as Nasturtium and flame flower like moist soil so keep well watered when it becomes dry. Unfortunately though Tropaeolum species like to grow in the sun their roots like it cool; it is important to keep them as protected as possible so maintain a permanent mulch around the roots.