Why Are My Sweet Potato Slips Dying After Planting?

A sweet potato slip that looked healthy and vigorous on the day of planting, then collapsed into a wilted, sorry-looking stem within twenty-four hours, is experiencing transplant shock. This is extremely common with sweet potato slips and — critically — does not mean the slip is dead or has failed. Understanding what is happening physiologically, and knowing how to support the slip through the first critical week, is the difference between a high success rate and losing the majority of your planting.

Why slips wilt after planting

A rooted slip transitions from the protected, stable conditions of its rooting environment (a jar of warm water or a pot of moist compost) to the variable, exposed conditions of an outdoor bed. At the moment of planting, the slip's root system is small and cannot yet supply water to the leaves at the rate the leaves lose it through transpiration. The leaves wilt to reduce their surface area and slow water loss while the roots extend and establish contact with the surrounding soil. This wilting is a physiological response, not a sign of death.

Planting conditions that help

Plant slips in the evening or on a cloudy day to reduce the heat and light stress in the first critical hours. Plant into moist soil — water the bed the day before. Bury at least two to three nodes of the stem below the soil surface, leaving only the top leaves exposed above the surface. The buried nodes will produce additional roots rapidly in warm soil. Water in gently after planting. Do not allow the soil to dry out for the first two weeks.

Providing shade after planting

Shading newly planted slips from direct sun for the first three to five days dramatically reduces the water demand on the still-unestablished root system. A simple shade cloth, a few layers of horticultural fleece, or even large leaves propped over the slips as shade reduces wilting and speeds establishment. Remove the shade once the slips show new growth and look turgid and upright in the morning.

When to give up on a slip

If a slip is still completely flat, brown and dry — showing no signs of recovery — at fourteen days after planting, it has died and should be replaced. A recovering slip shows at least some green at the growing tip, even if the older leaves have dried and died. Check each morning: if there is any sign of life at the tip, give it more time. Most slips that are going to establish show clear recovery within seven to ten days of planting in warm conditions.