How to Grow Petunias in Your Garden

This popular perennial flower does well and flowers all through summer until the onset of the cold season. Petunia comes in varieties and mass flowers, making the garden a seedbed of colorful summer blossoms. There are two major types of petunias; the compact bushy with an upright habit and the trailing variety may grow to a 90cm length. The bushy type is suitable for the borders of a garden, while the trailing type does well in hanging baskets. Discussed below are tips for growing petunias;

Different Types of Petunias

Below are five types of petunias you can grow; 

Grandiflora Petunias

Grandiflora petunia is the oldest variety of this flora, developed in the 1950s. The diameter of the bouquet-shaped flower is about 5 inches. Grandiflora thrives in moderate summer when there is little moisture and humidity. The series of the Grandiflora are; daddy, dream, ultra, storm, super cascade, and super magic. 

Credit: Pixabay

Milliflora Petunias

The Milliflora petunias are compact and miniature. The bloom produces numerous flowers that are only 1-1.5 inches wide. The flower spreads very, and my last an entire season. These characteristics make Millifloras suitable for flower bed borders and potted plants. Millifloras petunias has two series; fantasy and picobella. 

Credit: Pixabay

Multiflora Petunias

Multiflora petunia is small in size and produces numerous small blooms. It’s also vigorous and can bear windy environments. Compared to Grandiflora petunias, Multiflora varieties are robust as they can withstand rainy seasons. Multiflora is available with single or double flowers. Its series are; carpet, celebrity, horizon, mirage, and primetime. 


Floribundas Petunias

The Floribundas petunias is a hybrid of Multiflora and Grandiflora petunias and have picked the best qualities of the two series. The flower has the strength of multiflora and Grandiflora-like flowers. Floribundas endure the poor environment and produce average blooms as multiflora the series.

Credits: The National Gardening Association

Trailing or Spreading Petunias

Spreading or Trailing petunias can spread as wide as 3-4 feet. The spread forms beautiful and colorful bedding on the ground. The stems produce flowers on their entire length, making an ornamental groundcover. Trailing petunias are suitable for hanging baskets as they cascade from the sides of the container. 


Petunias Care and Maintenance

Petunias need regular watering and adequate sunlight; spreading petunias, in particular, require weekly watering to blossom properly. Plant your petunias in soil that comprises compost organic matter. Fertilize the plants with water-soluble fertilizers. Feed the flowers weekly as they are heavy feeders. Prune the flowers depending on the variety as each type has its preferences. Proper watering, lighting, feeding, and pruning will ensure you get beautiful blossoms the entire season. 

Petunias Propagation and Growth Conditions

Stems can propagate perennial trailing petunias. Harvest the branches from March to April or August to September in readiness to propagate. Propagate healthy non-flowering stems that are 7.5 to 10cms long, cut below a node. Plant the cuttings in a pot inside a propagator. Place the plants in an area with adequate light but away from direct sunlight. Let them root for 2-3 weeks. 

Petunias may be grown from seeds though it’s a tedious process. Plant the seeds at a temperature of 21°C. The seeds should be left uncovered since they need light to germinate. Sow them on moist compost placed inside a propagator to protect them from direct sunlight. This environment provides adequate light, shade, and warmth. The temperature in the propagator should range from 13 to15°C.

Petunias Pests and Diseases

When petunias are adequately taken care of, they are trouble-free. Some of the pests that bother them are mites, thrips, caterpillars, aphids, and budworms. They may get infected with powdery mildew. 


The above information on petunias is pretty hardy if you want to plant these cheery blossoms as they can do well in different climates. A gardener is indeed spoilt for choice by the series of flowers available in the market. In addition to this, the blooms require little care, are generally trouble-free, and produce numerous blossoms. 

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