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Asparagus

Asparagus officinalis · Asparagaceae

The gardener's calendar

The right move for September

Ideal time to plant asparagus: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

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ID card

Foliage
Deciduous
Flowering
Spring-summer (small white or greenish flowers)
Mature size
60 to 150 cm in height
Growth
Rapid once established
Hardiness
Excellent down to -15°C
Origin
Mediterranean region and Western Asia
Soil type
Well-drained, slightly chalky, rich in organic matter

Care

Watering

Water regularly during the growing season, especially when establishing and in summer. Reduce watering in autumn and stop almost entirely in winter. Overly moist soil promotes crown rot. Mulch the soil to maintain consistent moisture.

Exposure

Plant asparagus in full sun (at least 6 hours daily) for abundant harvests. It tolerates light partial shade, but production will be reduced. Avoid windy areas that can damage the aerial stems.

Soil Preparation and Maintenance

Prepare the soil deeply before planting (at least 30 cm) with generous additions of compost or well-rotted manure. Ensure impeccable drainage: asparagus fears waterlogging. Maintain neutral to slightly alkaline pH for good growth.

Nutrition

Apply balanced fertilizer in spring when growth resumes. At season's end, add compost or potash to build reserves for the following year. Avoid excess nitrogen, which reduces spear quality.

Pruning and Harvesting

Allow stems to become aerial after spring harvesting to rebuild underground reserves. In autumn, cut back the foliage to ground level once it yellows. Only harvest spears from the 3rd year after planting, and for only 4-6 weeks to avoid exhausting the plant.

Disease Prevention

Watch for rust (small orange pustules) and crown rot from excess moisture. Ensure good air circulation and avoid overcrowding plants. If rot occurs, remove affected stems and improve soil drainage.

Did you know?

Asparagus has been cultivated since antiquity: the Greeks and Romans already prized it, and it was even offered as an offering to the gods. In the Middle Ages, it nearly disappeared from Europe but was rediscovered during the Renaissance in Italy. Today, it remains one of the most prestigious and eagerly anticipated vegetable crops of spring.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.