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Seeds of a classic late variety from the Lazio tradition, with a round, white, tightly closed bulb and thick low-fiber sheaths.
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Pontino fennel is one of the best known and most valued late varieties in the vegetable-growing tradition of Lazio, its name recalling the Agro Pontino, its historic growing area. The plant is rustic, healthy and vigorous, with upright green stalks and dark leaves; the bulb is round, elegant, white and of good specific weight.
This is a herbaceous plant (Foeniculum vulgare var. azoricum) of the Apiaceae family, with wide, fleshy leaf sheaths overlapping to form the characteristic bulb at the base and an upright, hollow stem with thin, finely divided, dark green leaves. Pontino has a late growing cycle, typical of varieties intended for autumn-winter cultivation, with longer harvest times than early varieties.
The mature bulb is round, tightly closed and white, with thick, fleshy sheaths that are low in fiber and have a much-appreciated taste, qualities that make it a sought-after variety for the fresh market as well.
Being a late variety, sowing takes place from late June to September, with minimum temperatures stably above 14°C, in a seedbed or directly in open field. Seeds should be buried about 1 cm deep, keeping the soil consistently moist until germination. Sowing with some lead time ensures the bulb has enough time to fully develop before the harshest cold arrives.
Pontino fennel prefers medium-textured, fertile, well-draining soil rich in organic matter, and sunny exposure. Thanks to its rustic nature, it tolerates the temperature swings typical of autumn fairly well, while still remaining sensitive to the harshest frosts, like all bulb fennel varieties.
Watering must be regular and generous, especially during bulb swelling, and should be gradually reduced as harvest approaches to avoid rot. Companion planting with chicory and radicchio is traditionally considered favorable for late varieties like this one.
Periodic earthing up of the base is essential to promote whitening and compactness of the bulb, key strengths of this variety. In areas with harsher winters, it's helpful to protect plants with a floating row cover during the hardest frosts, to preserve harvest quality into late season.
Common diseases include downy mildew and xanthomonas, as well as septoria and cercospora, responsible for leaf spots. Among animal pests, aphids and swallowtail butterfly (Papilio machaon) caterpillars are the most frequent. Good crop rotation, avoiding sowing fennel where other umbellifers grew the previous year, helps prevent many of these issues.
The bulb of Pontino fennel is rich in water and fiber, with a low calorie content that makes it suitable for light, balanced diets. It contains potassium, important for the body's fluid and mineral balance, and the typical aromatic compounds of fennel, known for centuries for their digestive and carminative properties.