In this article, we will be discussing how to grow trumpet vine in containers to give beauty in the garden. Trumpet vine or Campsis radicans to give its Latin name is a plant that is worth growing in the container garden because of what beauty and joy it will bring. This is provided that you keep its rampant growth in check.
In its native America, it is known as a Hummingbird plant, where the 5-7.5cm long, red-orange to yellow, trumpet-shape flowers, attract these birds to pollinate them. The flowers often appear in early to midsummer, where its attractiveness can be admired.
WHAT IS TRUMPET VINES?
It is a huge and vigorous climber that often grows rampant in people’s garden, where it is often considered an invasive weed. Here in the UK, you often do not hear or see this plant being grown but hopefully, this will change in the near future.
One way to keep the growth in check is to grow the trumpet vine in a suitable sized container. This article addresses how to grow Campsis radicans and other cultivars of the trumpet vine in containers.
The vine clings to trellises, pergolas or arbours via aerial roots the plant produces. As it is a large and heavy plant, any support that you grow up must be strong. If you are growing against a house wall, you might need to add wire across it to provide additional support.
You have to make sure the aerial roots do not cling to the wall, as this can cause damage to the infrastructure. A plant that is great for covering vast areas on walls and fences.
It is an easy plant to look after, where they can grow up to 13m high.
VARIETIES TO GROW IN CONTAINERS
Campsis radicans x tagliabuana ‘Madame Galen’ is a cross between two cultivars vines; Campsis radicans (American Trumpet Vine) and Campsis grandiflora (Chinese Trumpet vine). It produces orange-red, trumpet-shape flowers that appear in clusters, where each flower can grow up to 8cm in length. Other varieties include ‘Indian Summer’ and ‘Trumpet Fire’
The leaves themselves are very attractive and can be large themselves, growing up to 30cm in length. It is a hardy plant but it can only take a temperature of -10 degree Celsius, so in cooler climates, it will need a shelter of a wall that is south-facing to produce an abundance of blooms.
Campsis radicans (American Trumpet Vine) is native to the eastern United States of America. It grows up to 12m in height, where this vigorous, woody vine, which is famous for its orange-red, trumpet-shaped flowers. The leaves are not as large only growing to 10cm in length. Varieties include ‘Flamenco‘ and ‘Stromboli’.
A less hardy variety is Campsis grandiflora (Chinese Trumpet Vine) that is a deciduous climber with large, orange, trumpet-shaped flowers. It is native to East Asia, where it can grow up to 10m in height. The flowers can be said to be larger and showier than its American cousin.
GROWING VINES IN CONTAINERS
If you want to grow this vigorous vine, it is best to grow as a climber rather than a trailer over the edge of a container. It will simply lose its charms if it is allowed to trail.
As its root structure are large then you will need a large container to grow it in, at least 20 to 30 litres in volume, where a half-barrel will make an ideal choice.
You will need to use a large container with sufficient drainage holes. Ideally, trumpet vines should be planted in spring, where it is allowed to establish over the growing season. Place the container 15cm away from the structure you wish the vine to grow up and do not move it, as it will get to heavy to move.
Fill a container with multipurpose compost with John Innes no 3 that is well-draining, but at the same tome moisture-retentive. Make a hole in the centre of the compost about the same size as the root ball the plant came when you bought it, gently remove the vine from its original container and then place it in the planting hole and firm the plant in.
Make sure it is planted at the original growth depth, no shallower or deeper. Backfill any gaps so that the roots are well covered. After planting, you will need to water well and continue to do so until the plant is well established.
MAKE SURE IT IS FROST HARDY
As most trumpet vines are hardy to -5 degree Celsius, there is a good chance you can leave your plants outside in winter. It is advised before you purchase a plant that it can survive a UK winter.
This is because it is difficult to move and cover a plant that is twining around a structure and is so large. If you live in a cool region, you will need to grow this plant inside a heated greenhouse, where the hard frosts can be kept at bay.
The structure must be strong and be able to support the full weight of the vine.
DO NOT FORGET TO PRUNE
Trumpet vines need to be pruned on the top in winter or early spring to thin out the growth and to improve its appearance. This is especially true, if it is very heavy on top, as this can damage the support structure and it will place the flower at the right height for you to observe them. Top pruning will also encourage the vine to form new shoots and growth from the bottom, a win-win situation.
You can get new plants from either propagating from stem cuttings or seeds. It will take a few years for a seed sown specimens to produce a good show of flowers. It is generally easy to grow from cuttings and that is usually the preferred propagation method.
Trumpet vines like most vines take time to establish a good root structure and pruning will help with the roots to develop and also will keep the vines from becoming excessively entangled.
Make sure that any roots that emerge from the container have not rooted down into any soil the container may be placed on, as this can add vigour to the plant, causing it to spread everywhere. This is why it is best to grow it on concrete, patio or paving stones, as this will curtail the spread of this rampant vine.
Occasional feed will not go amiss during the growing season, but not too much as this will cause the plant to grow more vigorously.
In this article, we have discussed how to grow trumpet vines in containers. As you can see it is not a difficult plant to grow, as long as it does not receive excessive cold in winter.
Apart from that, the only major concern is its rampant growth, which can take over a garden. Remember to prune in late winter to keep growth in check and to make sure that flowers can be observed at eye level.
A climbing plant that is worth the investment. If you have any question or comments that you wish to make, please do so in the comment box below.
Be triumphant today and grow a trumpet vine.