How To Grow Amaranth in Australia

Quick Guide: Growing Amaranth in Your Garden

  • Optimal Growing Temperatures: Between 18°C and 30°C.
  • Ready to Harvest: 7-8 weeks after planting.
  • Space Between Plants: Plant 50 cm apart.
  • Companion Plants: Onions, Corn, Peppers... (See More)
  • Plants to Avoid: None.
  • Plant Type: Seed.

When to Plant Amaranth in Australia

Australia Map


Best planting months for Amaranth in the Tropical regions are from April to August. This includes areas like Cairns, Darwin, and Broome.

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For the Subtropical region, Amaranth can be planted from January to April and August to December. Cities in the Subtropical region include Brisbane, Central Coast, and Sydney.

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Amaranth can be planted from January to March and September to December in the Temperate regions of Australia. Cities in the Temperate region include Melbourne, Adelaide, Geelong, and Perth.

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For the Cool region, Amaranth can be planted in the months of January, October, November, and December. Cities in the Cool region include alpine regions of Victoria and Tasmania.

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Best planting months for Amaranth in the Arid region are January to April and August to December.

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Getting Started with Amaranth

Before embarking on your amaranth-growing journey, it's important to understand the initial steps involved in getting started. This section will guide you through choosing the right variety of amaranth and selecting the ideal growing location for successful cultivation.

Choosing the Right Variety

There are numerous varieties of amaranth available, each with its own unique characteristics and growth requirements. When selecting a variety, consider factors such as climate suitability, desired use, and availability of seeds. Some popular varieties of amaranth include:



Red Leaf Amaranth

Vibrant red leaves with a mild flavour, suitable for salads and stir-fries.

Green Leaf Amaranth

Tender green leaves with a slightly tangy taste, ideal for soups and stews.

Grain Amaranth

It is grown for its nutritious seeds, used in baking and porridge, and as a gluten-free alternative.


Ornamental varieties with long, cascading red flowers add beauty to the garden.

When choosing a variety, consider your specific needs and preferences. Keep in mind that some varieties may be more readily available than others. It's best to source your seeds from reputable suppliers or nurseries to ensure quality and authenticity.

Selecting the Ideal Growing Location

Amaranth thrives in warm climates and prefers well-drained soil with ample sunlight. When selecting a location for your amaranth patch, keep the following factors in mind:

  • Sunlight: Amaranth requires at least 6 to 8 hours of direct sunlight each day for optimal growth. Choose a location that receives ample sunlight throughout the day.
  • Soil Quality: Amaranth prefers fertile soil with a pH between 6.0 and 7.5. Ensure the soil is well-draining to prevent waterlogging, as excessive moisture can lead to root rot.
  • Protection from Wind: Strong winds can damage amaranth plants, especially when they are young and tender. Consider planting in an area that offers some protection from strong gusts of wind.
  • Space Availability: Amaranth plants can grow quite tall, ranging from 3 to 8 feet in height. Ensure you have enough space to accommodate their mature size without overshadowing other plants.

If you're unsure about the suitability of your chosen location, consider conducting a soil test to assess its fertility and pH level. This will help you make any necessary amendments to optimise the soil conditions for amaranth.

By selecting the right variety of amaranth and finding an ideal growing location, you set the stage for a successful cultivation journey. In the next sections, we will delve into the soil preparation and planting process, ensuring your amaranth plants get off to a healthy start.

Preparing the Soil

Before planting amaranth in Australia, it is important to prepare the soil to provide the optimal growing conditions for this versatile plant.

Soil Requirements for Amaranth

Amaranth thrives in well-draining soil that is rich in organic matter. The ideal soil pH for amaranth ranges from 6.0 to 7.5. It is important to ensure that the soil is loose and friable, allowing for proper root development and water penetration.

To improve the soil structure and fertility, incorporating organic matter such as compost or well-rotted manure is highly beneficial. This helps to enhance the soil's nutrient content and moisture-holding capacity, providing a favourable environment for amaranth growth.

Soil Preparation Techniques

To prepare the soil for amaranth, follow these simple steps:

  1. Clear the area: Remove any weeds, rocks, or debris from the planting area. This ensures that the amaranth plants have ample space and resources to grow.
  2. Loosen the soil: Use a garden fork or a tiller to loosen the soil to a depth of around 8 to 10 inches. This helps to break up compacted soil and improves root penetration.
  3. Amend the soil: Incorporate organic matter, such as compost or well-rotted manure, into the soil. Spread a layer of organic matter over the planting area and mix it into the top few inches of soil. This helps to enrich the soil with nutrients and improves its structure.
  4. Level the soil: Rake the soil surface to create a smooth and level bed for planting. This provides an even surface for sowing seeds or transplanting seedlings.

By following these soil preparation techniques, you can create an optimal growing environment for amaranth. Remember to check the specific requirements of the amaranth variety you are growing, as certain cultivars may have slightly different soil preferences.

Now that the soil is prepared, it's time to move on to the next step in growing amaranth: planting the seeds or transplanting seedlings.

Planting Amaranth

To successfully grow amaranth in Australia, it's important to understand the best time to plant and the different methods of propagation. This section will guide you through the best time to plant amaranth in Australia and the options of sowing seeds or transplanting seedlings.

Best Time to Plant Amaranth in Australia

Amaranth is a warm-season crop that thrives in the heat, making it well-suited for growing in Australia. The ideal time to plant amaranth is during the spring and summer months when temperatures are consistently warm. In most regions of Australia, this would typically fall between September and February.

To determine the best planting time for your specific location, take into account the average frost dates and the local climate conditions. Amaranth requires a frost-free environment to grow successfully, as exposure to frost can damage or kill the young plants. For guidance on frost dates in Australia, you can refer to resources provided by your local agricultural department or gardening associations.

Sowing Seeds or Transplanting Seedlings

Amaranth can be grown from either seeds or seedlings, offering flexibility depending on your preferences and the resources available.

Sowing Seeds: Sowing amaranth seeds directly into the garden bed is a common and cost-effective approach. Start by preparing the soil (as discussed in the previous section) and ensure it is well-drained. Sow the seeds at a depth of approximately 1/4 inch (6mm) and space them according to the specific variety's recommendations, typically about 12-18 inches (30-45cm) apart. Keep the soil consistently moist until germination occurs, which usually takes around 7-14 days. Thinning may be necessary once the seedlings have grown to ensure proper spacing.

Transplanting Seedlings: If you prefer a head start or want to extend the growing season, you can start amaranth seedlings indoors 4-6 weeks before the last expected frost. Sow the seeds in seed trays or pots filled with a well-draining seed-starting mix. Place them in a warm location with ample sunlight or under grow lights. Once the seedlings have developed a few sets of true leaves and all risk of frost has passed, they can be transplanted into the garden. Dig holes that are slightly larger than the root ball of the seedlings and space them according to the recommended distance for your specific variety.

Regardless of whether you choose to sow seeds or transplant seedlings, make sure to water the plants adequately after planting to help them establish in their new environment. For more detailed instructions on growing specific vegetables and herbs in Australia, visit our comprehensive A-Z grow guides, such as how to grow lettuce in Australia or how to grow borage in Australia.

By understanding the best time to plant amaranth and the various propagation methods available, you can successfully start your amaranth journey. The next section will cover important aspects of caring for amaranth plants, including watering, fertilisation, and pest management.

Caring for Amaranth Plants

Once your amaranth plants are established, it's important to provide them with proper care to ensure healthy growth and a bountiful harvest. This section will guide you through the essential aspects of caring for your amaranth plants, including watering and irrigation, fertilising amaranth, and managing pests and diseases.

Watering and Irrigation

Amaranth plants require consistent moisture to thrive, especially during their early growth stages. Regular watering is essential, particularly during dry periods. Aim to keep the soil evenly moist, but be cautious not to overwater, as excessive moisture can lead to root rot.

To determine when to water your amaranth plants, check the top inch of soil. If it feels dry to the touch, it's time to water. Deep watering is preferable over shallow watering, as it encourages the plants to develop deep root systems. Consider using a soaker hose or drip irrigation system to deliver water directly to the base of the plants, minimising water waste.

Fertilising Amaranth

To support the healthy growth of your amaranth plants, it's important to provide them with the proper nutrients. Before planting, incorporate organic matter, such as compost or well-rotted manure, into the soil to enhance fertility.

During the growing season, you can further boost the nutrient levels by applying a balanced organic fertiliser. Look for fertilisers with a ratio of equal or similar amounts of nitrogen (N), phosphorus (P), and potassium (K). Follow the manufacturer's instructions for application rates and frequency.

Regularly check the leaves of your amaranth plants for signs of nutrient deficiencies, such as yellowing or stunted growth. If deficiencies occur, you may need to adjust your fertilisation practices accordingly.

Managing Pests and Diseases

Amaranth plants are generally resistant to pests and diseases. However, it's still important to monitor your plants for any signs of trouble. Common pests that may affect amaranth include aphids, flea beetles, and caterpillars. If you notice any infestations, you can try removing them by hand or using organic pest control methods, such as neem oil or insecticidal soap.

As for diseases, amaranth is susceptible to fungal infections, such as powdery mildew and damping-off. To prevent these diseases, ensure proper air circulation around the plants by providing adequate spacing. Avoid overhead watering, as it can create a humid environment that favours fungal growth. If necessary, apply organic fungicides according to the manufacturer's instructions.

By implementing proper watering, fertilisation, and pest and disease management techniques, you can ensure the health and vigour of your amaranth plants. For more gardening tips and techniques, check out our articles on how to grow lettuce in Australia, how to grow borage in Australia and how to grow corn in Australia.

Harvesting and Using Amaranth

After patiently tending to your amaranth plants, it's time to reap the rewards of your efforts. In this section, we will explore the important steps of harvesting amaranth, including knowing when to harvest, the proper techniques, and how to utilise this versatile plant in the kitchen.

Knowing When to Harvest

Determining the right time to harvest amaranth is crucial for achieving optimal flavour and nutritional value. The ideal time to harvest depends on the variety you're growing and the specific purpose for which you intend to use the plant.

Generally, amaranth can be harvested when the flowers have fully bloomed and the seeds have matured. The seeds should be firm and easily detach from the plant when gently rubbed. Keep in mind that if you're growing amaranth primarily for its leaves, you can harvest them at any stage of growth, starting from when the plants are around 10-15 centimetres tall. However, for seed production, it's important to allow the plants to fully mature.

Harvesting Techniques

When it comes to harvesting amaranth, there are a few techniques you can employ depending on your specific needs:

  1. Leaf Harvesting: To harvest amaranth leaves, simply snip off the desired amount of leaves using sharp garden shears or scissors. Start from the outer leaves and work your way inward, leaving a few leaves at the centre of the plant to allow for continued growth.
  2. Seed Harvesting: For seed production, allow the flowers to fully bloom and the seed heads to turn a dark brown or black colour. Cut the seed heads from the plants using pruning shears or a sharp knife, leaving a portion of the stem attached. Hang the seed heads upside down in a well-ventilated area to dry completely. Once dry, gently rub the seed heads to release the tiny seeds.

Utilising Amaranth in the Kitchen

Amaranth is a versatile plant that offers a range of culinary possibilities. Here are a few ways you can utilise amaranth in the kitchen:

  1. Cooked Grains: Amaranth seeds can be cooked and used as a nutritious grain alternative. Rinse the seeds thoroughly, then cook them in a 1:2 ratio of amaranth to water. Simmer the seeds for approximately 20 minutes or until they reach a tender consistency. The cooked grains can be enjoyed as a side dish, added to salads, or used as a base for pilafs or porridges.
  2. Flour: Amaranth seeds can be ground into fine flour that can be used in gluten-free baking. The flour adds a nutty flavour and a boost of nutritional value to bread, muffins, and other baked goods. Combine amaranth flour with other gluten-free flour for best results.
  3. Leafy Greens: The young leaves of amaranth can be enjoyed as a nutritious addition to salads, stir-fries, or soups. They have a mild, slightly earthy flavour that pairs well with a variety of dishes.

By harvesting amaranth at the right time and utilising it creatively in your kitchen, you can fully enjoy the bountiful benefits this plant has to offer. Experiment with different recipes and culinary techniques to make the most of your homegrown amaranth. For more information on growing other vegetables and herbs in Australia, check out our articles in our A-Z Growing Guides!

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