Tall Annual Plants for Containers


You are not restricted to growing just little plants if you want to cultivate them in containers since you may grow a wide variety of plant sizes. The addition of tall annuals, whether they are flowers or vegetables, provides a container garden with more visual interest. When trying to create a complete and interesting container arrangement, gardeners often blend tall plants with kinds that are either shorter or trailing.

Tall Annual Plants for Containers

Even when grown in the restricted environment of a container, certain annuals may grow to a height of two feet or more. Sunflowers, scientifically known as Helianthus annus, may be found in a variety of sizes, with some cultivars reaching heights of more than 6 metres (20 feet). In spite of their name, some varieties of miniature sunflowers may reach heights of more than one metre. Because it only reaches a height of around 1 metre (about 3 feet), the ‘Teddy Bear’ type is ideal for growing in a pot.

Cosmos (Cosmos bipinnatus), spiderflower (Cleome hasslerana), and blooming tobacco are a few more examples of tall annuals that you may like to explore (Nicotiana alata). Container gardening allows for the cultivation of tall crops such as determinate tomatoes (Solanum spp. ), sometimes known as bush tomatoes, and cucumbers (Cucumis sativus), which must be supported by a trellis. You may fill your container with colour by using hybrid fuchsia, which comes in a variety of hues including red, pink, and lavender (Fuchsia x hybrid).

Types of Gardening Containers

The length and breadth of the container are two important factors that influence how well annuals will grow. The plant’s roots will need a larger volume of space in the container as their size increases. The material that the container is made of is another factor to take into consideration. Plastic containers have a greater capacity to hold water in the soil for a longer period of time than unglazed clay containers. Wooden containers have an appealing appearance when they are initially used, but after a few seasons of usage, the wood may decay.

According to research conducted by the University of Illinois Extension, very few plants are able to thrive in a state known as root rot. Preventing root rot may be accomplished by including drainage holes in the bottom of the container. Pots that have saucers that are permanently connected should be avoided since it might be difficult to drain them.

Caring for Container Plants

Some varieties of annuals that grow rather tall, such as sunflowers, tomatoes, and cosmos, need staking or other forms of support in order to maintain their upright position when grown in containers. In most cases, the necessary support may be obtained by securing the plant’s stem to a bamboo stake. When it comes to feeding and watering the plants, you need to find the sweet spot that works best for your garden. If you give tomato plants an excessive amount of nitrogen, for instance, they will produce plenty of leaves but very little fruit. When provided with an excessive amount of water or fertiliser, cosmos plants produce less blooms than they are capable of producing on their own. To ensure that your sunflowers and tomatoes have the best chance of success, you should water them well.

If you want to blend plants in a container, choose plants that have requirements for watering and fertiliser that are comparable to one another. Never combine shade-loving annuals with sun-loving tall annuals in the same planting.

Arranging the Plants

When putting up a plant arrangement in a container, “Fine Gardening” magazine writer Steven Silk suggests utilising the “thrillers, spillers, and fillers” method. This method categorises plants based on their height and width. The tall annuals are referred described as “thrillers.” The tall plant is often the focus of interest in the container because of its height. There is always one surprise within the most beautifully pleasing containers. The tiny plants that are used to fill in areas surrounding the larger plants that are known as “thrillers.” Plants that are cultivated for their leaves might be blooming plants, low-growing plants, or plants that produce flowers. The last kind of plant is called a spiller and it drapes over the side of a pot or other container. The combination of thrillers, fillers, and spillers in a one container results in a design that is aesthetically harmonious.