The CityMax Group Potato Full Growth Cycle Nutrition Program is designed to maximize yield, quality, and marketable tuber production through stage-specific nutrient management. By integrating humic substances, biostimulants, water-soluble fertilizers, and micronutrients, the program improves soil health, stimulates root development, supports balanced vegetative growth, enhances tuber initiation and bulking, and promotes starch accumulation. This comprehensive approach helps overcome common challenges such as soil compaction, continuous-cropping stress, and low nutrient-use efficiency, delivering stable yields, improved tuber quality, and higher economic returns for potato growers.
Potato, as the world’s fourth-largest food crop, develops its yield through the coordinated process of soil health, root development, canopy growth, tuber formation, and dry matter accumulation. From emergence and root establishment to tuber initiation, bulking, and final starch accumulation, each growth stage requires different levels and balances of nutrients. Scientific nutrient management is therefore essential for achieving high yield, premium quality, and a high marketable tuber rate.
To address common production challenges such as soil compaction, continuous-cropping obstacles, weak root systems, low nutrient-use efficiency, and uneven tuber bulking, CityMax Group has developed a comprehensive potato nutrition program. By integrating humic substances, biostimulants, water-soluble fertilizers, and secondary and micronutrients, this program provides complete nutritional support from soil improvement and root establishment to tuber enlargement and quality enhancement.
Ⅰ.Nutritional Characteristics of Potato
Potato is a nutrient-demanding crop. Under high-yield production systems, the nutrient uptake ratio is approximately:
N : P₂O₅ : K₂O = 1 : 0.5 : 1.5
Potassium is required in the largest quantity and plays a critical role in tuber initiation, enlargement, and quality development.
Nutrient requirements vary throughout the growth cycle:
In many potato-growing regions, continuous cropping often results in soil compaction, salinity buildup, and increased soil-borne diseases. Therefore, nutrient management should focus not only on fertilizer supply but also on soil activation and rhizosphere improvement.
Ⅱ. Full Growth Cycle Nutrition Program
Growth Stage
Recommended Products
Recommended Rate
(per hectare)
Application Method
Main Functions
Basal Application (Before Planting)
Well-decomposed organic fertilizer
Compound fertilizer (15-15-15)
DIMONDMAX NO.2
Organic fertilizer: As required
Compound fertilizer: 450–600 kg
DIMONDMAX NO.2: 75–150 kg
Incorporated into soil
Improves soil structure and reduces compaction; provides long-term nutrient supply; activates phosphorus and potassium and improves fertilizer efficiency
Emergence Stage (5–10 Days After Emergence)
HUMICARE – Root-Promoting Type
45–75 L/ha
Fertigation or root drench
Rapid root development and seedling establishment; improves tolerance to cold and drought stress; helps alleviate herbicide injury
Vegetative Growth Stage (Plant Height 15–25 cm)
ULTRA HUMIMAX DF
MAXGREEN (32-9-10)
ULTRA HUMIMAX DF: 15 kg/ha
MAXGREEN (32-9-10): 150 kg/ha
Fertigation
Improves root activity and soil condition; promotes vigorous vegetative growth
Early Tuber Bulking (Bud to Early Flowering Stage)
MAXGREEN (20-20-20)
Aminomax Anti-cracking
MAXGREEN (20-20-20): 150 kg/ha
Aminomax Anti-cracking: 1.5 L/ha (1:1000 dilution)
Fertigation + Foliar Spray
Supports tuber initiation; supplies calcium to reduce hollow heart and cracking; promotes cell wall formation
Mid Tuber Bulking Stage
Maintains root vigor and balanced nutrition; supports stable tuber enlargement
Late Tuber Bulking Stage
MAXGREEN (13-8-34)
AMINOMIX
MAXGREEN (13-8-34): 150 kg/ha
AMINOMIX: 1 kg/ha (1:1000 dilution)
Provides high potassium for tuber enlargement; supplies micronutrients to delay senescence and improve tuber skin quality
Starch Accumulation Stage (Canopy Begins to Yellow)
MAXGREEN (6-12-40)
120 kg/ha
Promotes dry matter transfer into tubers; increases starch content and marketable yield
All liquid fertilizers are recommended for application through fertigation systems to maximize nutrient-use efficiency.
Foliar fertilizers may be tank-mixed with compatible low-toxicity fungicides or insecticides. Avoid mixing with strongly alkaline pesticides.
Humc-acid-based products should not be mixed directly with conventional calcium or magnesium fertilizers to prevent precipitation and irrigation system blockage.
Ⅲ. Key Product Specifications and Functions
Product
Technical Specifications
Main Benefits
Bacillus subtilis + Bacillus licheniformis + Paenibacillus mucilaginosus ≥ 1×10¹⁰ CFU/g；Humic Acid: 18%；
SiO₂: 15%；CaO: 7%；MgO: 3%；Fe: 1.5%
Activates soil, chelates micronutrients, and improves fertilizer-use efficiency
N+P₂O₅+K₂O ≥ 250 g/L
(120-80-50)
Seaweed Extract ≥ 150 g/L
B + Zn ≥ 5 g/L
Promotes rapid rooting and seedling establishment; enhances stress tolerance
Humic Acid ≥ 40%；
N-P-K = 4-2-14
O-Fe+Cu+Zn+B+Mn ≥ 4%
Improves root health, enhances soil microbial activity, and delays premature aging
N-P-K = 32-9-10 + TE
O-NMT Biostimulant: 3%
High-nitrogen formula for vigorous vegetative growth
N-P-K = 20-20-20 + TE
Balanced nutrition for sustained growth and delayed senescence
N-P-K = 13-8-34 + TE
High-potassium nutrition for tuber enlargement and carbohydrate accumulation
MAXGREEN
(6-12-40)
N-P-K = 6-12-40 + TE；
High-potassium formula promoting dry matter and starch accumulation
Ca ≥ 130 g/L；
B ≥ 10 g/L；
Polyols ≥ 85 g/L；
Amino Acids ≥ 100 g/L
Prevents hollow heart and cracking; improves tuber quality and marketability
Total Amino Acids ≥ 35%；
Free Amino Acids ≥ 10%；
Fe+Zn+Cu+B+Mn ≥ 10%
Prevents micronutrient deficiencies, delays senescence, and improves yield and quality
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