Italian Large Leaf

Basil

Zone 9b Save Garden

Botanical illustration of Italian Large Leaf

🌱 50d to harvest Upright

Fragrant as a warm summer breeze, Italian Large Leaf basil fills the garden with a lush, sweet-anise lift and a distinctly rounde…

Crop Dates

Milestone	Date
Start Indoors	Dec 29th
Last Frost	Feb 9th
Transplant / Sow Outdoors	Mar 23rd
Harvest Begins	May 12th
Harvest Ends	Dec 9th

Crop Details

Trait	Value
Days to Maturity	50
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	10

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Frequently Asked Questions

What’s a common basil (Ocimum basilicum) disease or pest, and how do I fix it?

Fungal downy mildew is one of the most common problems in basil, showing as yellow patches on the top of leaves with gray-purple growth on the underside. Remove infected leaves immediately, improve airflow by spacing plants, and avoid wetting foliage when you water. If mildew keeps spreading, use a labeled fungicide suitable for edible herbs and follow the timing on the label.

How often should I water Italian Large Leaf basil during the main growing phase?

During active growth (roughly the first 4–6 weeks), keep the soil consistently moist but not soggy—water when the top 1 inch of soil feels dry. Aim for deep watering at the base so excess moisture doesn’t linger on the leaves. In hot weather you may need watering every 1–2 days, while cooler periods may stretch to every 3–4 days.

How can I tell when Italian Large Leaf basil (Ocimum basilicum) is ready to harvest?

Harvest when plants are about 8–12 inches tall and the leaves are fully sized, typically around 50 days to maturity. Pick the top sets of leaves and pinch above a leaf pair to encourage branching; you should see new side shoots shortly after. Start harvesting in the morning for best leaf quality, and continue regular picking to delay flowering.

Fragrant as a warm summer breeze, Italian Large Leaf basil fills the garden with a lush, sweet-anise lift and a distinctly rounded, green flavor. Leaves are broad and tender with a velvety, succulent texture—ideal for generous handfuls of fresh use and for bold, aromatic sauces that cling with ease. Grow Italian Large Leaf for its fast, satisfying 50-day turnaround and its showy, kitchen-garden presence from first harvest to the season’s peak.

Sowing Tips

Transplant Conditions

Wait until soil reaches 60°F and nights stay above 50°F before moving outdoors. Harden off for 10 days first.

Expert Note

Warm up the planting bed before transplanting and keep soil evenly moist—basil is very sensitive to cold and will sulk in cool nights.