Basil Classico Italiano (Ocimum basilicum L.) is a traditional Genovese-style basil with large, tender leaves and an intense, sweet aroma that defines authentic Italian pesto. This heritage variety forms compact, vigorous plants that thrive on sunny windowsills, patios and balconies, making it a perfect choice for small spaces and container gardening.
The lush green foliage has a rich, slightly spicy flavour that enhances tomato salads, pasta dishes, soups and pizzas, as well as classic pesto sauces. This mid-early type produces strong, branching plants that respond well to regular picking, giving a long season of fresh leaves from a single sowing. Approximate seeds quantity: about 4000 seeds per packet, ideal for repeated sowings through the year.
🌱 Sowing information
Sow seeds on the surface of fine, free-draining compost and cover very lightly with compost or vermiculite, then water gently. Start indoors or under cover from March, then continue with small successional sowings in pots or containers for a continuous supply of fresh leaves.
☀️ Light exposure
Basil needs warmth and full sun, so place pots on a bright south- or west-facing windowsill, or in a sunny, sheltered outdoor spot once conditions are mild. In the Irish climate, protection from cold winds and night chills is essential for strong, aromatic growth.
💧 Water needs
Keep the compost evenly moist but not saturated, allowing the top surface to dry slightly before watering again. Water at the base of the plants in the morning to keep foliage dry and reduce the risk of fungal issues in cool, damp weather.
🌡️ Germination temperature & time
Seeds germinate best at 18–22 °C and normally emerge within 7–14 days. Use a warm indoor position or propagator in early spring for reliable results in Ireland.
📏 Plant spacing & final size
When seedlings have several true leaves, pot on or thin to around 20–25 cm between plants so they can develop into bushy clumps. Mature plants typically reach 30–45 cm tall, with dense leafy growth ideal for frequent harvesting.
🌼 Harvesting notes
Begin harvesting by pinching out the top shoots once plants are well established, encouraging branching and new growth. Remove flower buds as they appear to keep flavour at its best, and use harvested leaves fresh, or preserve them as pesto or in olive oil for later use.
🌱 Sowing depth: Lightly cover, approximately 0.5 cm deep
📅 Ideal planting months for Ireland: Sow from March–July outdoors in warm, sheltered spots; sow indoors or under cover the rest of the year
☀️ Light requirements: Full sun; bright, warm windowsill or sheltered outdoor position
🌡️ Germination time: About 7–14 days at 18–22 °C
📏 Plant height: Approximately 30–45 cm at maturity
🪴 Spacing: 20–25 cm between plants or clumps
⏳ Days to maturity: Roughly 60–75 days from sowing to first main harvests
🧪 Approximate seeds quantity: about 4000 seeds per packet
Tips & Tricks for Growing (Garden Expert Section)
In Ireland, start Basil Classico Italiano in a warm indoor spot from March, then move plants outside only when nights stay comfortably above 10 °C. Use high-quality, free-draining compost in medium-sized pots and feed lightly with an organic liquid fertiliser every couple of weeks to keep plants lush and productive.
Pinch back stems regularly and avoid letting plants dry out completely, as stress can reduce flavour and encourage early flowering. If growing on a windowsill, rotate pots every few days so plants receive light evenly and do not lean strongly towards the glass.
Garden-to-Table Recipe (for 4 people)
Creamy Basil Pesto Gnocchi
Ingredients (for 4 people)
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600 g potato gnocchi
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40–50 g fresh Basil Classico Italiano leaves
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40 g pine nuts (or toasted almonds)
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50 g grated Parmesan or Grana Padano
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1 small garlic clove, crushed
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80–100 ml extra virgin olive oil
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50 ml single cream (optional, for extra richness)
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Salt and freshly ground black pepper, to taste
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Handful of cherry tomatoes, halved (optional)
Method – step-by-step
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Bring a large pan of salted water to the boil and cook the gnocchi according to the packet instructions until they float to the surface.
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Meanwhile, place basil leaves, pine nuts, garlic and a pinch of salt in a food processor or mortar and grind to a coarse paste.
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Add the grated cheese and blend again, then slowly pour in the olive oil until you have a smooth, spoonable pesto.
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If using cream, stir it into the pesto for a silkier sauce and adjust seasoning with salt and pepper.
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Drain the gnocchi, reserving a small cup of cooking water, then return them to the warm pan.
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Toss the gnocchi with the pesto, loosening with a splash of cooking water so they are evenly coated and glossy.
Serving suggestions & variations
Serve immediately in warm bowls, finishing with extra basil leaves, a sprinkle of Parmesan and a few cherry tomato halves for freshness and colour. For a variation, add steamed green beans, swap pine nuts for walnuts, or use the pesto as a topping for grilled chicken or roasted vegetables.
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