Shungiku (Garland Chrysanthemum)

Sow thinly a quarter to a half inch deep in damp, well-drained soil, in rows about 18 inches apart. Sow a fresh short row every two to three weeks while the weather stays cool rather than one big planting. Shungiku grows best between 68 and 84F and turns bitter and runs to flower once real heat arrives, so the crop is only good for the weeks before that. Successive small sowings keep tender shoots coming instead of handing you one bolting bed.

Work in a balanced fertilizer before sowing at roughly the rate you would give lettuce, aiming near 2 pounds of actual nitrogen per 1000 square feet across the crop, and side-dress lightly after a hard cut. Target soil pH between 5.2 and 7.5. This is a fast leaf crop harvested in about six weeks, so nitrogen is what you are actually growing. Korean work found yield optimized near 100 kg N per hectare, which is where that rate comes from, and there is no yield reason to push past it. UF/IFAS has no fertility recommendation specific to this crop and directs growers to follow lettuce rates for now. Bitterness in shungiku comes from heat and bolting, not from fertility, so do not expect a feeding change to fix a bitter bed.

Once seedlings are up and handleable, thin to roughly 2 inches apart in the row, or up to 6 inches if you want big multi-cut plants. Eat the thinnings. Repeat after each succession sowing. Shungiku is sown thickly and crowded stands run to a single thin stem and bolt sooner. Thinning gives each plant the light to branch, which is where the repeat harvests come from.

Walk the bed and pinch out flower buds as they appear, unless you are deliberately growing the crop on for edible petals. Once a planting is budding faster than you can pinch, cut the whole thing and sow again. As soon as the plant commits to flowering it stops putting sugar into leaves and the foliage turns coarse and bitter. Removing buds keeps it in vegetative growth and pushes new shoots instead.

Turn leaves over every few days while the crop is sizing up and look for aphids, whitefly, mites, and the pale winding tunnels of leafminer. Also watch for powdery mildew film in crowded, still plantings. Pull or cut out badly mined leaves rather than trying to salvage them. These are the pests recorded on edible chrysanthemum, and every one of them lives on the part you eat, so damage is not cosmetic here the way it is on a fruit crop. A leaf with a mine in it is not a leaf you can sell or serve.

Harvest roughly 40 to 45 days from sowing when plants are about 8 inches tall. For repeat cuts, take the top of the shoot and leave one or two side branches or four to five basal leaves behind; for one clean harvest, cut the whole plant at the soil surface. Broadleaf types will keep giving weekly cuts. Pick in the cool of the day. Flavor and tenderness peak just before the plant starts to bud, and leaving basal leaves or a branch gives the plant the working foliage it needs to regrow rather than stall. Cutting in the heat of the day wilts the leaf before it reaches the kitchen.

Start sowing again when nights begin to cool, and keep sowing every two to three weeks through the cool season. In hot-summer regions this autumn-into-winter window is the main crop, not a bonus. Falling temperatures and shortening days hold the plant in leaf instead of pushing it into flower, so autumn-sown shungiku stays sweeter and gives more cuts than the same seed sown in spring.

Throw floating row cover over the bed when light frost is forecast to keep cutting later into the season. Plan to have the crop finished before a hard freeze rather than trying to overwinter it uncovered. Shungiku takes light frosts only. A few degrees of protection buys real extra weeks in autumn, when the leaf quality is at its best, but the plant has no deep cold hardiness to fall back on.