Sweet potato can be grown hydroponically in deep substrate, drip-fed containers, or grow bags, with vigorous vines above ground and storage roots forming best.
Varieties
Variety
Latin Name
Orange-fleshed sweet potato
Ipomoea batatas
Purple sweet potato
Ipomoea batatas
White-fleshed sweet potato
Ipomoea batatas
Japanese sweet potato
Ipomoea batatas
Beauregard sweet potato
Ipomoea batatas
Lookalikes
Lookalike
Latin Name
Description
True yam
Dioscorea spp.
Often confused by name, but true yams are unrelated vines with different tubers.
Potato
Solanum tuberosum
Unrelated solanaceous tuber crop with compound leaves and underground stem tubers.
Edible Parts
Part
Use
Description
Toxicity
Storage roots
Primary edible crop eaten baked, roasted, boiled, fried, or processed.
Harvest when roots reach desired size; cure after harvest when appropriate to improve sweetness.
Generally edible when properly grown and handled.
Young leaves and shoots
Edible leafy green in many cuisines, usually cooked or stir-fried.
Harvest tender shoot tips without removing too much foliage needed for root development.
Generally edible from food cultivars when clean.
Propagation
Part
Method
Description
Slips
Rooted shoot transplants
Start slips from healthy sweet potato roots or purchase disease-free slips.
Vine cuttings
Rooting nodes in water or moist media
Cut healthy vine sections with several nodes and root in water or moist substrate.
Growing Parameters
Parameter
Range
Optimal
Unit
pH
5.5 - 6.8
5.8 - 6.3
pH
Electrical conductivity
1.2 - 2.4
1.6 - 2.0
mS/cm
Air temperature
20 - 32
24 - 29
°C
Root zone depth
25 - 50
30 - 40
cm
Cultivation
Aspect
Compatibility
Notes
Deep media bed
High
Best hydroponic-adjacent method for storage roots; use deep, loose, well-aerated media.
Drip irrigation with loose substrate
High
Suitable in coco, perlite blends, sand mixes, or other friable substrates.
Nutrient film technique
Low
Unsuitable for mature storage-root production because channels do not provide depth or support.
Identification
Growth habit: Warm-season trailing or vining perennial usually grown as an annual for swollen storage roots and edible shoots.
Leaves: Leaves are alternate and may be heart-shaped, lobed, or deeply cut depending on variety.
Storage roots: Edible enlarged roots vary in skin and flesh color, including orange, purple, white, cream, and yellow.