How Do I Propagate Artichokes from Offsets?

Propagating artichokes from offsets is the preferred method for home gardeners who want to multiply their plants quickly. Offsets carry the genetic identity of the parent plant — producing plants identical to the parent — and establish far more rapidly than seed-grown plants. An offset taken in spring typically produces usable heads in its first or second season, compared to the two or more years required for seed-grown plants to reach full productivity.

What an offset is

Artichoke plants produce shoots (offsets, also called suckers or side shoots) from around the crown base throughout spring and summer. These shoots grow from the outer edge of the crown, push up through the soil beside the main stem, and gradually develop their own root systems. Once rooted, they can be separated from the parent plant and grown on as independent plants, carrying the full characteristics of the parent variety.

Timing

The best time to take offsets is early spring — March to early April — when the offsets are 10–15 cm tall and clearly rooted but the season's growth has not yet made them too large to transplant successfully. Later in the season, offsets can still be taken (May–June) but they need more careful aftercare as their larger leaf area loses water more rapidly. Never take offsets in midsummer during head production.

Selecting and removing an offset

Choose an offset from the outside of the crown that is 10–15 cm tall, firm and healthy. Expose the base by brushing away some soil. Insert a sharp spade or large knife alongside the offset, angled to slice through the connection to the parent crown while retaining as much root as possible. Lift the offset with its piece of crown plate and roots. Trim any large outer leaves to reduce transpiration stress during establishment.

Establishing the offset

Plant immediately in a prepared hole enriched with compost. Plant at the same depth as it was growing. Firm well and water in thoroughly. Keep well watered for the first three to four weeks. Some wilting in the first few days is normal and expected — the plant will recover as roots spread into the surrounding soil. Do not feed until new growth is clearly visible.