A Seasonal Guide for Healthy Clivias and Exceptional Flowers

By Carrie Krüger – Utopia Clivias

Clivias are one of South Africa’s most beloved shade garden plants. Known for their striking flowers and resilience, these plants thrive when their natural seasonal growth cycle is respected.

Whether you are growing Clivias in pots, shade houses, or garden beds, understanding when to water, feed, divide, and harvest seed makes a significant difference in plant health and flowering performance.

At Utopia Clivias, we follow a structured seasonal management system that supports strong plants and successful breeding. This guide explains how to care for Clivias throughout the year under Southern Hemisphere growing conditions.

Clivia Seasonal Care Calendar – Southern Hemisphere

Summer Clivia Care (November – February)

Growth, Feeding, and Plant Maintenance

Summer is the active growth period for Clivia plants. After spring flowering, plants focus on producing new foliage while developing berries from pollinated flowers.

At Utopia Clivias we apply a balanced liquid fertiliser, a systemic insecticide, and a fungicide soil treatment to support healthy growth while protecting plants from pests and diseases during the warmer months.

Feed Your Clivias

After flowering, plants benefit from a balanced feeding program.

At Utopia Clivias we apply:

• A balanced liquid fertiliser

• A systemic insecticide

• A fungicide soil treatment

This combination supports healthy growth while protecting plants from pests and diseases during the warmer months.

Manage Heat and Watering

Summer temperatures can be intense, particularly in South African shade houses.

Best practices include:

• Maintaining good airflow

• Keeping shade structures cool

• Watering regularly but avoiding overwatering

• Ensuring excellent drainage

Too much heat combined with excess moisture can encourage fungal problems.

Watch for Root and Stem Rot

Warm, humid conditions can cause fungal diseases.

Preventative measures include:

• Monitoring plants regularly

• Using hydrogen peroxide or contact/systemic fungicides around the root zone

• Maintaining healthy airflow

Early intervention prevents serious damage to plants.

Autumn Clivia Care (March – May)

Seed Protection and Plant Management

Autumn is a transitional period when Clivias prepare for their winter dormancy.

It is also an important time for protecting developing seed pods and managing young plants.

Protect Developing Seeds

Clivia berries continue to mature during autumn.

Seed heads should be:

• Staked for support

• Protected with vegetable netting or mesh

This prevents stems from breaking and ensures seeds mature successfully.

Plant Out Seedlings

March is an excellent time to transplant young plants.

• One- and two-year-old seedlings can be moved from trays

• Plant them into individual pots or community containers

This allows the root systems to establish before winter.

Repotting and Dividing Clivias

Autumn is also an ideal time to:

• Repot larger plants

• Divide mature Clivia clumps

• Replant offsets from mother plants

Cooler temperatures reduce stress and allow plants to settle before winter.

Winter Clivia Care (June – August)

Dormancy and Seed Harvesting

Winter is a crucial rest period for Clivias. Cool temperatures encourage the development of the next season’s flower buds.

Proper winter care strongly influences spring flowering.

Harvesting Clivia Seeds

Clivia berries typically ripen between June and August.

Seeds are ready when berries feel soft when gently pressed.

Seed Preparation Steps

1. Harvest berries using clean scissors or a knife

2. Wash seeds to remove all pulp

3. Disinfect seeds with mild bleach, fungicide, or hydrogen peroxide

4. Allow seeds to air dry for 24–48 hours

5. Sow immediately or store temporarily in the refrigerator

Always label seeds with the parent cross and date for breeding records.

Reduce Watering

During winter, Clivias require very little water.

• Water only when soil becomes almost completely dry

• Avoid constant moisture

• Ensure containers drain well

Overwatering during winter is one of the most common causes of plant problems.

Maintain Cool Temperatures

Clivias require cool winter temperatures for successful flowering.

Ideal conditions:

• Night: 5–10°C

• Day: 18–20°C

Plants should be protected from frost but not kept in warm heated spaces, as this can interfere with flower development.

Spring Clivia Care (August – September)

Bud Development, Flowering, and Pollination

Spring is the most exciting time in the Clivia growing cycle. Plants break dormancy, flower spikes emerge, and the breeding season begins.

Increase Watering Gradually

As buds begin to push:

• Gradually increase watering

• Avoid sudden heavy irrigation

• Maintain good drainage

Begin Light Feeding

Start a balanced fertiliser at half strength to support flower development.

Avoid excessive nitrogen, which encourages leaf growth rather than flowers.

Monitor Pests

Spring pests can affect developing buds.

Watch for:

• Mealybugs

• Aphids

Early detection helps protect flowers.

Controlled Pollination

The best time to pollinate Clivia flowers is 3–5 days after the bloom opens, typically in the morning when pollen is most viable.

At Utopia Clivias every plant is hand pollinated to ensure controlled breeding and elite plant selection.

Accurate labeling and record keeping are essential when producing new hybrids.

Growing Better Clivias

Successful Clivia growing depends on working with the plant’s natural seasonal cycle. Each season plays an important role in plant health, flowering quality, and seed production.

By following a structured Clivia care calendar, growers can produce stronger plants, better flowers, and healthier seedlings year after year.

At Utopia Clivias, this seasonal approach forms the foundation of our nursery management and breeding programme.