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Library > Herbs > Basil

Plant profile

Basil

Frost: Frost TenderHardiness: TenderType: Annual

Best month to plant in Melbourne (AU Zone 5): October

It's currently Spring in Melbourne; perfect time to prep your basil bed.

Vital Stats

Sowing depth: 0.5 cm

Spacing: 25-30 cm

Sun: Full Sun

Water: Moderate to high in summer

Growth Cycle

Germination: 5-10 days

Maturity: 55-75 days

Companions: Tomato, Capsicum, Marigold

Climate-Specific Warnings

Local Climate Note

Guidance is tuned to Melbourne (AU Zone 5). Keep drainage, airflow, and frost timing aligned with current seasonal conditions.

Cheat Sheet

Sun

Full Sun

Water

Moderate to high in summer

Soil pH

6.0-7.5

Pro Tip

Pinch tops every week once established to keep basil bushy and delay flowering.

Popular Cultivars

Fine-leaf culinary selections: Chosen for flavor intensity and frequent kitchen harvests.
Ornamental foliage selections: Useful for mixed borders and pollinator-friendly planting.

Nearby Natives: Perfect for Your Local Soil

Zone 5 logic is active for your location, so these native plants are prioritized for resilient local performance.

Kangaroo Paw

Anigozanthos flavidus

Grevillea

Grevillea rosmarinifolia

Lomandra

Lomandra longifolia

How to Plant

Sow in trays and keep at warm room temperature.
Transplant after final frost risk in your microclimate.
Space for airflow to reduce fungal pressure.

Ongoing Care

Water in the morning to keep leaves dry overnight.
Feed every 2-3 weeks during peak growth.
Remove flower buds for continuous leaf harvest.

Troubleshooting Pests

Slugs: trap early around young plants.
Downy mildew: water soil only and remove affected leaves.
Heat scorch: provide afternoon shade in heatwaves.

Seasonality Bar (Melbourne context)

Toggle between yearly month-grid planning and a compact timeline with stage-specific tasks.

SowGrowHarvestCurrent month marker

Sow

Grow

Harvest

October focus (current month)

Sow

Start seeds in trays at about 0.5 cm depth, then transplant with around 25-30 cm spacing. Keep light and airflow consistent in Melbourne.

Climate Logic

Wait for warm nights before transplanting to avoid cold shock.

Best month by AU/NZ band

Temperate: October
Mediterranean: September
Subtropical: September
Tropical: August
Cool: November

Advanced Climate Logic

Live BOM Soil Moisture Percentile

Live BOM signal is currently unavailable. Continue using the baseline guidance below.

Melbourne Microclimates

Coastal Melbourne sites (for example St Kilda) are usually milder overnight; use lighter mulch (2-3 cm) to avoid keeping root zones too cool and wet.
In colder inland valleys (for example Yarra Valley), frost hangs longer; use thicker mulch (5-7 cm once soils warm) and in frost-prone pockets, keep tray sowing shallow and delay transplanting by 1-2 weeks.

La Nina / El Nino Adjustments

When BOM flags a wetter La Nina phase, cut scheduled irrigation frequency, water only after checking root-zone moisture, and improve airflow to reduce fungal pressure.
When BOM flags a drier El Nino phase, increase deep watering cadence, mulch heavily, and prioritize morning irrigation to reduce stress during heat spikes.

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