Leslie Massey
Cress is a peppery, nutrient-rich herb that is a versatile addition to any Australian garden. It is easy to grow and can be cultivated by both children and adults. With its distinct flavour and nutritional benefits, cress can be grown from seeds or alternative mediums like cotton wool or hydroponics. Australian climates are well-suited to cress cultivation, and gardeners can maximise their harvest by incorporating companion planting with herbs such as basil, mint, or nasturtiums.
| Characteristics | Values |
|---|---|
| Cress Variety | Common garden cress or watercress |
| Climate | Australian climates are well-suited for cress cultivation |
| Soil | Well-draining, pH ranging from 6.0 to 7.5 |
| Spacing | 2-3 cm between seeds |
| Watering | Consistent, especially during germination |
| Companion Plants | Basil, mint, or nasturtiums |
| Harvest Time | 2-4 weeks after sowing |
| Growing Medium | Soil, cotton wool, hydroponics, or water |
| Seed Depth | 1 cm deep |
| Seed Spacing | 5-10 cm apart |
| Protection | From slugs, snails, and parasites |
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What You'll Learn
Choosing the right seeds
Seed Variety
Select common garden cress or watercress varieties, depending on your preference. Watercress, also known as Nasturtium microphyllum or Scurvy Grass, is closely related to vegetables like broccoli, cabbage, and radish. It is a nutrient-rich herb with a peppery taste, making it a delicious addition to sandwiches and salads.
Seed Source
Opt for reputable suppliers to ensure the quality of your cress seeds. In Australia, you can explore options from suppliers like Australian Plants Online and Eden Seeds, among others.
Seed Starting Options
Cress seeds can be sown directly into the ground or started in alternative mediums like moist paper towels, cotton wool, or hydroponics setups. If you choose to start with paper towels or cotton wool, simply place the seeds on the moistened surface, cover them with paper, and keep them well-watered until germination occurs.
Seed Spacing
Proper seed spacing is crucial for healthy cress growth. When sowing directly into the ground or containers, aim for a spacing of 2-3 cm between seeds, or approximately 5-10 cm if you're planting them about 1 cm deep.
Soil Preparation
Prepare well-draining soil with a neutral pH, ideally between 6.0 and 7.0 for common cress, and between 6.5 and 7.5 for watercress. Enrich the soil with organic matter, such as Scotts Performance Naturals Organic Based Soil Improver, to provide your seeds with an optimal environment for germination and growth.
Remember, Australian climates are well-suited for cress cultivation, so with the right seeds and care, you'll soon be enjoying the fruits (or vegetables!) of your labor.
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Preparing the soil
Select a suitable location: Choose a spot in your garden that receives morning sun or partial shade. Watercress thrives in morning sun and partial shade, so finding a balance between the two is ideal. Ensure the location gets consistent moisture without drying out, as cress prefers moist soil.
Test the soil pH: Cress grows best in soil with a neutral pH. Aim for a pH level between 6.0 and 7.0. You can purchase pH testing kits to determine the acidity or alkalinity of your soil. Adjust the pH as needed by adding amendments.
Enrich the soil: To provide the best environment for your cress, enrich the soil with organic matter and nutrients. Mix in organic-based soil improvers and fertilisers to enhance the quality of the soil. You can also add compost to the soil to improve its structure and fertility.
Ensure proper drainage: Cress requires well-draining soil. Make sure your planting site has adequate drainage to prevent waterlogging, which can negatively impact the roots.
Spacing and depth: When sowing cress seeds, maintain a spacing of 2-3 cm between seeds. For watercress seeds, a depth of 1 cm and a spacing of 5-10 cm is recommended. This spacing allows for proper ventilation and helps prevent issues like damping-off.
Companion planting: Maximise the benefits of companion planting by growing cress alongside compatible plants. Herbs like basil, mint, or nasturtiums pair well with cress, enhancing flavour, repelling pests, and promoting overall garden health.
By following these soil preparation steps, you'll be well on your way to successfully growing cress in your Australian garden.
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Spacing and positioning
Spacing
When sowing cress seeds, it is important to maintain a spacing of 2-3 cm between them. This spacing allows adequate room for each seed to germinate and grow into a healthy plant. Proper spacing also promotes air circulation, reducing the risk of damping-off and fungal diseases.
Positioning
Cress thrives in environments with a pH range of 6.0 to 7.5. It is well-suited to Australian climates, which provide favourable conditions for germination. When selecting a planting area, choose a spot that receives morning sun or partial shade. This is particularly important during the warmer months, as cress prefers cooler temperatures. Ensure the soil is consistently moist, as cress should never be allowed to dry out. Enrich the soil with organic matter before planting to provide additional nutrients.
Additionally, consider companion planting to enhance the flavour of your cress and promote overall garden health. Cress pairs well with herbs such as basil and mint, as well as nasturtiums. Incorporating a variety of companion plants encourages biodiversity and creates a more resilient and balanced growing environment.
By following these spacing and positioning guidelines, you can create an ideal environment for your cress to thrive and reap the rewards of a bountiful and nutritious harvest.
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Watering and moisture
Soil Moisture
Cress thrives in moist soil, and it is important to never let the soil dry out completely. During the germination phase, maintain consistent moisture in the soil. Water the soil regularly throughout the growing period. If growing cress in warmer months, daily watering is essential, and the plant will also require protection from the hot sun.
Soil Preparation
Before planting cress, enrich the soil with organic matter. For garden beds, mix through organic-based soil improver and all-purpose organic-based fertiliser. If growing in pots, use an organic-based potting mix. Ensure the soil has good drainage.
Watering Practices
Monitor your cress crop closely and adjust watering practices as needed. If growing in a pond or water container, change the water frequently to prevent the growth of slime or algae. Avoid growing watercress in water near animal waste, as this can attract parasites.
Companion Planting
Maximise moisture retention and overall garden health by incorporating companion plants. Cress pairs well with basil, mint, and nasturtiums. This encourages biodiversity and creates a more resilient growing environment.
Seed Starting
When starting cress from seed, you can sow directly into moist garden soil or use a moist paper towel, blotting paper, or cotton wool pads. Cover with paper until the seeds germinate. Keep the medium moist throughout germination and the early growth stages.
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Common issues and solutions
Watering issues
Watering is crucial for cress growth. Insufficient watering can cause stunted growth, while overwatering can lead to wilting and yellowing leaves. To maintain optimal moisture levels, water your cress every 2-3 days, ensuring the top layer of soil is moist. Regularly check the soil's moisture level and adjust your watering schedule accordingly.
Leggy growth
Leggy growth in cress is often due to insufficient sunlight or overcrowding. To rectify this, thin out your seedlings, ensuring a spacing of 2-3 cm between them, and relocate them to a sunnier spot, aiming for 4-6 hours of daily sunlight.
Yellowing leaves
Yellow leaves can indicate either nutrient deficiencies or overwatering. Adjust your watering schedule and improve fertilisation by incorporating organic matter and compost into your soil to restore the vibrant green colour of your cress.
Pests and diseases
Cress may attract pests like aphids, flea beetles, and cabbage worms. Treat these pests with natural remedies such as neem oil or insecticidal soap, and implement companion planting to repel them. Diseases like downy mildew and root rot can be prevented by practising crop rotation and proper watering techniques to avoid a damp environment.
Bacterial leaf spot
Bacterial leaf spot is a disease that manifests as irregularly shaped brown spots on the plant's above-ground parts. To manage this, water the plants at the soil level, dispose of fallen leaves and fruit, and practise crop rotation.
Bolting
Bolting occurs when the cress plant prematurely flowers and goes to seed. Prevent this by providing adequate sunlight, optimal moisture, and balanced fertilisation.
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Frequently asked questions
Cress is easy to grow in your home garden, especially in cooler climates. It can be grown from seeds, seedlings, or cuttings. Seeds should be sown 1cm deep, 2-3 cm apart, into prepared garden soil or a potting mix if growing in pots.
Cress thrives in soil with a pH ranging from 6.0 to 7.5. The soil should be well-draining and consistently moist during the germination phase. It is recommended to enrich the soil with organic matter before planting cress.
Cress is generally robust, but it may encounter challenges such as damping-off, aphid infestations, or fungal diseases. Proper ventilation, spacing, and regular monitoring are essential to prevent these issues. If problems occur, remove affected plants, adjust watering practices, or use natural remedies like neem oil for pest control.
Harvest cress when the leaves are young and tender, usually within 2-4 weeks after sowing. Harvesting can be done in just a week or two from sowing, and sowing can be done monthly all year round to ensure a continuous fresh supply of leaves.
