Sweet Potato - Opportunities at Transplant

May 11, 2020

Info to Grow
Sweet Potato
Plant Nutrition
Blog

Agronomics / Background
Like most crops, it’s important for sweet potatoes to get off to a fast start and the first opportunity to ensure a quality start is at transplant. BRANDT has a pair of fertility options that, when included with transplant water, will help give sweet potatoes the early vigor needed to reach their potential.

 

BRANDT Plant Start is a concentrated liquid fertilizer with N, P, K and Mo designed to promote early growth, healthy root systems and plant vigor.

 

BRANDT® GlucoPro® is a plant growth regulator that helps unlock glucose from lectin proteins. This flush of glucose allows the plant to utilize this energy to carry out metabolic functions. As with BRANDT Plant Start, BRANDT GlucoPro offers the best return when used with transplant water.

 

Conditions Leading to Nutrient Deficiencies
Sweet potatoes can tolerate drought to some extent but are sensitive to low oxygen supply and cannot withstand waterlogging. Therefore they are most often grown on sandy, well-drained soils. Optimal soil pH is 5.8-6.2 but lower pH can lead to nutrient deficiencies.

 

Desired Tissue Test Values

Crop: Sweet potato
Stage: Early vining - most recently matured leaf and petiole

Macronutrients

Micronutrients

%

ppm

N

4 - 5

Fe

40 - 100

P

0.3 – 0.5

Mn

40 – 100

K

2.5 - 4

B

25 – 60

Ca

0.8 – 1.6

Cu

205 - 10

Mg

0.4 – 0.8

Zn

20 - 40

S

0.2 – 0.6

Mo

0.19 – 0.22

*Bryson, Mills, et al.  “Plant Analysis Handbook III”.  2014.

 

Key Application Timings and Rates

  • Use 1 quart of BRANDT Plant Start per 100g of transplant water, or 2-4 quarts per acre.
  • Use 10 oz per acre of BRANDT GlucoPro during transplant to increase available glucose.