HortiSynthesis
Unique horticultural MTU® biostimulant that increases photosynthesis and crop nutrient use efficiency

HortiSynthesis is the next‑generation biostimulant for horticultural crops.
Now available to the horticultural sector through Hortifeeds.
HortiSynthesis is a new and exclusive MTU biostimulant developed from a formulation that has delivered outstanding results in arable crops for several years. Now available for the horticulture sector through Hortifeeds, it is designed to enhance photosynthetic efficiency, strengthen plant resilience, and drive increases in yield and crop quality.
How HortiSynthesis Works
HortiSynthesis improves both the rate and efficiency of photosynthesis, helping plants convert light into energy more effectively for stronger, faster growth. This increased photosynthetic activity raises cellular sugar levels, boosting productivity throughout the season.
Key benefits include:
- Accelerated establishment and improved early growth
- Enhanced stress tolerance, helping plants cope with heat, water variability, and other abiotic challenges
- Better nitrogen utilisation, reducing toxic ammonia accumulation during stress
- Healthier, more efficient root systems, increasing nutrient uptake
- More consistent growth during challenging periods, with reduced growth checks
Active Components
MTU (1-(2-methoxyethyl)-3-(1,2,3‑thiadiazol‑5‑yl) urea)
- Activates phytochrome, improving red/far‑red light absorption
- Increases chlorophyll content
- Stimulates the AHK3 cytokinin receptor, promoting stronger root development and improved resilience
PGA (an amino acid)
- Enhances nitrogen assimilation and utilisation
- Reduces toxic ammonia build‑up under stress
- Contributes to chlorophyll synthesis and overall plant health
Fruit Production
HortiSynthesis trials on strawberries grown in coir in the Netherlands showed an increase in marketable yield of 5.2% from 3 applications at 0.25 L/Ha, as well as an increase in size grade and Brix. This trial also showed an increase in fruit firmness and shelf life.
HortiSynthesis trials on apples grown in Hungary showed an increase in marketable yield of 12.0% from 2 applications at 0.5 L/Ha, as well as an increase in size grade.
Ornamentals
Improves the rate and efficiency of photosynthesis in plants for optimal establishment, growth and performance.
HortiSynthesis improves and speeds up establishment and increases stress resilience – ideal for use in peat-free growing media to reduce the transplant stresses, but equally beneficial to crops grown in peat and other substrates.
It promotes stronger, healthier root structure, improving establishment, reducing stress and increasing nutrient uptake.
HortiSynthesis increases the plants’ ability to utilise nitrogen, keeping the plant growing more healthily, increasing crop quantity, quality and health.
Helps photosynthesis in plants enabling them to grow better for longer periods, with less growth check.
Application Rate
|
Crop |
Application Rate |
Application Number |
Notes | Label |
|---|---|---|---|---|
| Apples, pears, cherries, vines and other woody perennial crops | 0.2 to 0.5 L/Ha | 1 or 2 | BBH 71-77 (during the development of fruits) | Link |
|
Strawberries and other soft fruit |
0.25 L/Ha |
1 to 3 |
BBH 10-88 (leaf development to fruit ripening) | |
| Vegetables, ornamentals and aromatic medicinal plants | 0.2 to 0.25 L/Ha | 1 or 2 | BBH 10-19 (leaf development) - for leafy vegetables |
It is suitable for tank mixing (subject to usual good practice checks) with insecticides, fungicides, seaweeds etc. for foliar application, and can help the plant utilise other components improving overall efficacy.
Trial Results
Strawberries (grown in coir under protection)
Increased yield of at least 5.2% from 3 applications (mean of 4 replicates)
Apples
Increased plants’ ability to utilise nitrogen, keeping the plant growing more healthily, increasing crop quantity, quality and health.
HortiSynthesis trials on apples grown in Hungary showed an increase in marketable yield of 12.0% from 2 applications at 0.5 L/Ha, as well as an increase in size grade.
Sunflower
Increased yield of 21.1% from a single application at the BBCH18-33 stage (mean of 4 replicates).
Available Sizes:
1 Litre Bottle
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