Snow In Summer

Family: Caryophyllaceae

Genus: Cerastium

Species: biebersteinii

History

Snow in Summer forms a silvery, ground-hugging carpet topped with crisp white flowers in early summer. Native to the Caucasus, it's drought-tolerant and thrives in poor soils. In Australia, it's grown in rockeries, edges, and dry spots where its cool-toned foliage and resilience shine.

Sowing Calendar

Best Months to Plant – Snow In Summer
Climate ZoneJanFebMarAprMayJunJulAugSepOctNovDec
Cool/Mountain✓✓✓✓✓✓
Temperate✓✓✓✓✓✓✓✓✓✓✓✓
Arid✓✓✓✓✓✓
Subtropical✓✓✓✓✓✓✓✓✓✓✓✓
Tropical✓✓✓✓✓✓✓✓✓✓✓✓
Cool/Mountain – Snow In Summer
MethodJanFebMarAprMayJunJulAugSepOctNovDec
Start in trays✓✓✓✓✓✓
Plant out transplants✓✓✓✓✓✓
Direct sow✓✓✓✓✓✓
Temperate – Snow In Summer
MethodJanFebMarAprMayJunJulAugSepOctNovDec
Start in trays✓✓✓✓✓✓✓✓✓✓✓✓
Plant out transplants✓✓✓✓✓✓✓✓✓✓✓✓
Direct sow✓✓✓✓✓✓✓✓✓✓✓✓
Arid – Snow In Summer
MethodJanFebMarAprMayJunJulAugSepOctNovDec
Start in trays✓✓✓✓✓✓
Plant out transplants✓✓✓✓✓✓
Direct sow✓✓✓✓✓✓
Subtropical – Snow In Summer
MethodJanFebMarAprMayJunJulAugSepOctNovDec
Start in trays✓✓✓✓✓✓✓✓✓✓✓✓
Plant out transplants✓✓✓✓✓✓✓✓✓✓✓✓
Direct sow✓✓✓✓✓✓✓✓✓✓✓✓
Tropical – Snow In Summer
MethodJanFebMarAprMayJunJulAugSepOctNovDec
Start in trays✓✓✓✓✓✓✓✓✓✓✓✓
Plant out transplants✓✓✓✓✓✓✓✓✓✓✓✓
Direct sow✓✓✓✓✓✓✓✓✓✓✓✓

Where to Plant

In-Ground Garden Beds

In-Ground Garden Beds
• Traditional garden beds dug directly into the soil
• Suitable for deep-rooted crops and long-term plantings
• Offers natural soil ecology and drainage benefits
• Requires proper soil preparation and weed management

Shady Spots & Herb Gardens

Shady Spots & Herb Gardens
• Areas receiving dappled or indirect sunlight, often near trees or buildings
• Best for shade-tolerant herbs like mint, parsley, or greens like spinach
• Helps prevent sun stress and conserves moisture
• Often used in cooler corners of the garden

Pre-treatment

Stratification (Cold)

• Mix seeds with moist vermiculite or paper towel in a sealed bag
• Refrigerate for 2–12 weeks depending on species
• Mimics natural winter conditions to break dormancy
• Ideal for perennials and cold-climate wildflowers

Sowing Method

Start in Trays

• Fill seed trays or punnets with quality seed-raising mix
• Sow seeds at the correct depth—refer to seed packet for guidance
• Place trays in a warm, sheltered location with good light
• Mist or bottom-water to avoid disturbing small seeds
• Transplant seedlings once they develop 2–4 true leaves

Direct Sow

• Sow seeds directly into prepared garden soil or outdoor containers
• Best for plants that dislike transplanting, such as root vegetables and beans
• Loosen soil and remove weeds before sowing
• Sow at the recommended depth and spacing, then water gently
• Keep the area moist until germination and thin seedlings if needed

Watering

High

• Requires consistently moist soil, particularly during warm or dry periods
• Best suited to shallow-rooted or leafy plants such as lettuces, leafy greens, and tropical herbs
• May need daily watering in hot, exposed locations or sandy soils
• Avoid letting soil dry out—wilting may occur quickly if moisture is lost
• Use mulch and drip irrigation to maintain even moisture levels

Fertilisation

Frost

Frost Tolerant

These plants can tolerate light to moderate frosts and may survive through cooler seasons.

Maintenance and Harvesting

Snow In Summer spreads quickly, so trim it back hard after flowering to prevent it becoming invasive and to encourage compact, tidy growth. It thrives in poor, well-drained soils and doesn't need fertiliser. Remove spent flowers promptly to maintain a neat look and avoid excessive self-seeding.

Pests and Diseases

Aphids

Aphids are tiny, soft-bodied insects that cluster on new growth and the undersides of leaves. They suck sap from plants, causing leaves to curl, yellow or become distorted. As they feed, they excrete sticky honeydew that encourages sooty mould, and colonies can build quickly in warm weather.

Start with organic controls: blast colonies off with a firm jet of water, encourage beneficial insects like ladybirds and lacewings, and spray neem oil or insecticidal soap to disrupt feeding. Keep plants well watered and avoid excess nitrogen that promotes soft growth. If pressure remains high, selective chemical sprays can be used sparingly, taking care to protect pollinators and beneficials.

Leaf spot

Leaf spot describes several fungal or bacterial diseases that create dark, often round lesions on foliage—sometimes with yellow halos. Severe infections cause premature leaf drop and reduced vigour, especially during warm, wet spells or when leaves stay damp.

Reduce spread by removing infected leaves, watering at the base, and spacing plants for airflow. Mulch to limit soil splash and rotate crops. Organic preventatives include copper and sulfur sprays applied early. If disease escalates, registered fungicides offer a chemical backup.

Crown / root rot (Wet)

Crown and root rots are caused by water‑loving fungi that attack stems at the soil line and roots below. Plants yellow, wilt, and eventually collapse because their roots can no longer supply water and nutrients—most common in heavy, waterlogged soils.

Prevention is key: improve drainage, raise beds, and water deeply but less often. Avoid injuring stems at the soil line and rotate away from affected beds. Solarising soil in summer can knock back pathogens. Chemical drenches have limited benefit in home gardens and are best used preventatively rather than curatively.

Two-spotted spider mites

Two‑spotted spider mites are tiny sap‑suckers that stipple leaves, causing a speckled, yellow look and fine webbing—worst in hot, dry conditions. Unchecked, plants can defoliate.

Increase humidity around plants, hose undersides of leaves, and release or encourage predatory mites. Neem and horticultural oils suppress populations organically. Miticides exist for heavy outbreaks; rotate actives to reduce resistance.

Rust

Rust diseases produce raised orange‑brown pustules on leaves and stems. Spores disperse easily on wind and water, causing repeated reinfection and gradual weakening of plants.

Remove infected material and avoid wetting foliage. Grow resistant varieties where possible and rotate crops. Organic sulfur or copper sprays can protect new growth; systemic fungicides are a chemical fallback if rust persists.

Growing Tips

• Snow In Summer may grow leggy in shade; provide more sun and trim to keep compact.
• Snow In Summer can struggle in heavy, waterlogged soils; improve drainage and avoid over-watering.
• Snow In Summer performs best with steady moisture and regular harvesting to promote new growth.