Botanical name: Agave filifera
Synonyms: Agave filamentosa, Agave pseudofilifera, Bonapartea filamentosa
Thread Agave is one of popular Agave plants for the indoors due to its compact size. It is an evergreen perennial which forms a stemless rosette up to 3 ft across and up to 2 ft tall. The leaves are dark green to a bronzish-green color about 1 ft long. They bear fine thread-like filaments and hence the common name. The plant is native to Central Mexico from Queretaro to Mexico State. Thread Agave grows slowly and may take a long time to out grow its pot. Avoid disturbing the plant as much as possible as they do not like to be disturbed.
Thread Agave grows best in bright light with direct sunshine. A bright sunny window with as much sun as possible is ideal. Avoid exposing you plant to direct sunlight before acclimatizing it as it can get sun burned. Learn how to ensure your plant receives adequate light in this guide on understanding light for houseplants.
Water Thread Agave thoroughly during the hot season, when the soil begins to dry out. Water very infrequently in the cold months. Avoiding wetting the center of the rosette as it can lead to rotting. Water from the bottom instead. Use room temperature water to avoid plant shock. Learn more on how to water houseplants.
Warm temperatures between 21-320C are ideal for Thread Agave. Though it can tolerate lower temperatures of up to 100C. The sudden change in temperature between day and night is excellent for this succulent.
Average room humidity is adequate for Thread Agave. The plant does not require high humidity; it does not mind dry air.
Feed Thread Agave monthly during the growing period with a water-soluble fertilizer, only in the first 2 years of growth. Established plants do not require regular feeding; feeding may encourage blooming leading to premature death; Agaves are monocarpic, they die once they bloom leaving pups for propagation.
Repot only when necessary; when the plant becomes pot-bound. Use a shallow rather than a deep pot; they have shallow roots. The pot should be only 1 size larger. Ensure the pot is properly drained; waterlogging can lead to root-rot. Though the plant is tolerant to most soils, it prefers sandy or rocky soil. To protect yourself from the sharp spines, always wear gloves when handling this plant.
Prune Thread Agave by cutting dead or diseased leaves with sharp strong shears, a long sharp knife or a curved pruning saw to minimize tearing and injury to yourself; the leaves have spines and are quite tough to cut.
Thread Agave can be propagated from seeds but they take long to develop. Propagation from offsets that form at the base of the plant is easier and much faster. Seperate the offset from the mother and remove any damaged roots. Allow the offsets to dry (callous) for 1-3 days before potting. Select an offset which has several leaves. Plant the offset in a moist free-draining soil. Ensure the pot has a drainage hole to avoid waterlogging. Water sparingly, only when the soil is dry; avoid waterlogging which can lead to root-rot.
Overwatering during the cold period is the cause of wilted and discolored leaves in Thread Agave. Reduce watering in the cold season to maintain the soil slightly moist.
Brown dry spots in Thread Agave are due to underwatering during the hot season. Water thoroughly during the hot period when the soil begins to dry out.
Brown soft spots in Thread Agave Plant are caused by Leaf spot disease which is enhanced by poor air circulation. Ensure there is free air circulation at all times.
Rotting plant base followed by yellowing and shrivelled leaves in Thread Agave Plant is an indication of basal stem-rot disease which is brought about by overwet conditions. Avoid overwatering, ensure the pot has a drainage hole and the soil is free-draining.
Thread Agave Plant produces a sap that can cause skin dermatitis in sensitive people. The leaves of Thread Agave bear sharp spines which may cause injury if handled with bare hands. Always wear gloves when handling the plant.