Garden Care Guide

Century Plant Care

Agave americana

A very large, sculptural succulent that creates a striking focal point in the landscape. It needs full sun and well-drained, sandy soil. Care should be taken with the spiny leaf tips and the sap, which can irritate the skin.

Half-hardy · -8 °C / 18 °F

Monthly care calendar

Timings are for a temperate Northern Hemisphere climate. In warmer areas tasks start earlier, in colder areas later; in the Southern Hemisphere shift them by six months.

January
  • Watering: Stop watering. In winter, wet soil is the most common cause of root rot.
  • Pruning: Cut only the lowest leaves that have dried out completely, at the base, for aesthetic purposes.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: Preventing water from pooling at the base of the plant is the most important care.
  • Pests & diseases: Make sure water does not collect in the root zone. Softening and darkening at the root collar are signs of root rot.
  • Frost risk: In hard and prolonged frosts, cover the root zone with mulch or dry leaves; also protect young plants. It is damaged below about -8 °C.
February
  • Watering: Stop watering. In winter, wet soil is the most common cause of root rot.
  • Pruning: Continue removing dry leaves if needed.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: The best time before spring growth begins to plant a new agave or to separate and plant the offsets.
  • Pests & diseases: Make sure water does not collect in the root zone. Softening and darkening at the root collar are signs of root rot.
  • Frost risk: In hard and prolonged frosts, cover the root zone with mulch or dry leaves; also protect young plants. It is damaged below about -8 °C.
March
  • Watering: Stop watering. In winter, wet soil is the most common cause of root rot.
  • Fertilizing: Not needed. If it must be applied, a very dilute, low-nitrogen cactus fertilizer can be given once (do not overdo it).
  • Pruning: Remove only dry lower leaves.
  • General care: Good time for planting and transplanting.
  • Pests & diseases: Check for rot at the base of the trunk.
  • Frost risk: Low risk.
April
  • Watering: Once a month, water when the soil is completely dry.
  • General care: Good time for planting and transplanting.
  • Pests & diseases: Generally hardy.
May
  • Watering: Once a month, water when the soil is completely dry.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: Suitable period for planting and transplanting. Drainage is critical for this plant. In heavy, water-retaining soil, plant on a mound or bed raised 20-30 cm; the root collar should remain above the surrounding soil level.
  • Pests & diseases: If you see black spots with yellow halos on the leaves (black spot), collect the diseased leaves and remove them from the garden; the disease overwinters in fallen leaves.
June
  • Watering: After the soil has dried out completely, water a little at a time every 15-20 days.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: It is fully resistant to hot and dry conditions.
  • Pests & diseases: If you see black spots with yellow halos on the leaves (black spot), collect the diseased leaves and remove them from the garden; the disease overwinters in fallen leaves.
July
  • Watering: After the soil has dried out completely, water a little at a time every 15-20 days.
  • General care: Flowering begins.
  • Pests & diseases: Sunscald may occasionally appear on variegated forms.
August
  • Watering: After the soil has dried out completely, water a little at a time every 15-20 days.
  • General care: Flowering continues.
  • Pests & diseases: Generally hardy.
September
  • Watering: Once a month, water when the soil is completely dry.
  • Pruning: Prune as soon as flowering ends. Next year's flower buds form over the summer; late pruning reduces flowering. After flowering is complete, the main rosette dies; the offsets are separated and replanted. Use protective gloves because of the thorny leaf edges.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: A great time to separate the offsets and plant them in their new places.
  • Pests & diseases: If you see black spots with yellow halos on the leaves (black spot), collect the diseased leaves and remove them from the garden; the disease overwinters in fallen leaves.
October
  • Watering: Once a month, water when the soil is completely dry.
  • Pruning: You can remove dry lower leaves.
  • General care: Autumn is one of the best seasons for planting a new agave.
  • Pests & diseases: With the rains, make sure drainage is good to guard against the risk of root rot.
November
  • Watering: Stop watering. In winter, wet soil is the most common cause of root rot.
  • Pruning: Do the final cleanup.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: In winter rains, make sure water does not pool in the root zone; for this plant, drainage is more critical than irrigation.
  • Pests & diseases: Make sure water does not collect in the root zone. Softening and darkening at the root collar are signs of root rot.
  • Frost risk: Low risk, but be ready to cover very young plants in case of a sudden cold snap.
December
  • Watering: Stop watering. In winter, wet soil is the most common cause of root rot.
  • Plant protection: If symptoms spread and treatment is needed, consult a licensed plant-protection supplier or an agronomist. Plant protection products are regulated; follow local rules.
  • General care: Evergreen leaves continue to lose water in winter. Water thoroughly once before the soil freezes.
  • Pests & diseases: Make sure water does not collect in the root zone. Softening and darkening at the root collar are signs of root rot.
  • Frost risk: In hard and prolonged frosts, cover the root zone with mulch or dry leaves; also protect young plants. It is damaged below about -8 °C.

The care advice on this page is general and for information only; it is not professional advice. Plant age, soil and your garden’s microclimate can change the outcome. Plant protection products are mentioned only as general information; they are regulated, and the choice, dose and timing must be decided by a qualified professional under local rules. Consult a landscape architect or agronomist before applying.

Want reminders for every plant in your garden? Our garden-care app with monthly task lists and frost alerts is currently available in Turkish; the English version is on the way.

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