Torenia fournieri
Deep dive into technology
Syngenta Flowers APAC Technical Webinar for Tropical Regions 03-09-2025 2 p.m.
Inka Orange 70041091
Torenia facts.
Torenia is an eatable plant.
Torenia is native to South Asia.
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Torenia portfolio #1.
Series
Genetic
Pot size
Width Height
Habit
Specific features
Duchess
Syngenta Packs / 9–12 cm 20–25 cm 20–25 cm Mounding Compact Torenia
Packs / 10–15 cm, Hanging Baskets 40–50 cm 30–40 cm Mounding More vigorous habit
Hi Lite
Floranova
Page 60 – 2024/25 Catalog
Page 98 – 2024/25 Catalog
Floranova
Syngenta
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Torenia portfolio #2.
Duchess
Hi Lite
Pots, Patio Pots, Landscape
Pots, Patio Pots, Landscape, Hanging Basket
4 colors & 1 mix
6 colors & 1 mix
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Torenia landscaping application.
Torenia is efficient crop for the tropical climate conditions.
It is genetically hot tolerant.
Able to create colorful carpets.
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5 elements of success with Torenia.
Light for germina- tion.
Botrytis.
pH < 5.8.
Don’t keep too deep!
Good Shading.
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https://www.youtube.com/@SyngentaFlowersAPAC/videos
Sowing / germination stage #1.
• Suggested tray size – 288 cell
• Seed – place 1 seed per cell • Do I need to cover the seed?
✓ Nor need!
✓ Light is required for germination.
• Germination chamber - optional
Light for germina- tion.
Provide the light in the germ. chamber
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Substrate #1.
Most of the substrate types are acceptable.
• Suitable substrate components: peat > cocopeat > wood fiber peat > rice husk or composts. With particle size 0―10 mm.
• The bigger cocopeat grains and the rice husk can use instead of perlite
Wood fiber peat
Rice husk
Is the best solution
Cocopeat
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Substrate #2.
Substrate mixture is better than an individual component.
Cocopeat 70%
Rice husk 30%
Biological protection.
Rice husk 30%
Wood fiber 70%
Cocopeat 50%
Rice husk 30%
Peat 20%
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Substrate #3.
• Soil Temp: 24 0 C
18 19 20 21 22 23 24 25 26
• Substrate and water pH: 5.5―5.8
5
2 3 4
6 7 8
• SME: 0.5 mS/cm.
Level 5 SATURATED
Level 4 WET
Level 3 MEDIUM
Level 2 MEDIUM DRY
Level 1 DRY
pH < 5.8.
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Seedlings production. Provide shading.
•
Temperature - Day:
18 19 20 21 22 23 24 25 26
- Night:
18 19 20 21 22 23 24 25 26
•
Light intensity : 25―30 KLux
Partial Sun/Shade
Light Shade
Moderate Shade
Heavy Shade
Full Sun
Good shading.
• Provide shading to reduce light intensity & temperature in the greenhouse.
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Fertigation tips #1.
Feed your Torenia seedlings properly.
• Provide 75―125 ppm of nitrogen (N). • You can provide proper amount of N by 0.6―0.9 g/l of 18-5-18, 15-3-15 or similar.
• Optimal EC in the water 1.5 (up to 1.8 in sunny and hot condition) • Optimal EC in the substrate (SME*): 0.5―0.75 mS/cm.
pH < 5.8.
• Substrate and water pH: 5.5―5.8
Hungry plants because of high pH.
5
2 3 4
6 7 8
Healthy plants.
* Saturated Media Extract
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Fertigation tips #2.
Apply Ca(NO 3 ) 2 + Mg(NO 3 ) 2 every week (or every 2 weeks).
week 1
week 2
week 3
week 4
week 5
1.7
pH < 5.8.
1.5
1.5 1.5
1.5 1.5
1.5 1.5
1.5 1.5
1.5
1.3 1.3 1.3
1.3
1.3 1.3
1.3 1.3
1.3 1.3 1.3
1.0
0.7
Water EC, mS/cm
0.4-0.5
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Substrate for the ready plants. • Available substrate components: cocopeat > wood fiber peat > rice husk > natural soil > compost. How to choose suitable substrate components? • Feel free to use any kind of substrate components if they are providing... Proper pH level 5.5―5.9 , ✓ Hygienic conditions, ✓ Aerated enough, ✓ Low EC: 0.5―0.75 • Use a mixture: 50/50 peat + cocopeat or 50/50 cocopeat + rice husk. • Particle size 5―20 mm. 2 3 4 5 6 7 8
pH < 5.8.
• Add 20 % leavening agent: perlite > coco chips > sand > zeolite > vermiculite
Biological protection.
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Transplanting time.
What is the proper stage for the Torenia?
Which the pot size and how many plants?
3 pares of leaves is the best stage*.
Torenia can fit even the big pots.
* Young plant production takes about 4―5 weeks.
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Transplanting. How to chose the pot size?
Torenia pot size recommendation.
Pot size
6 l hanging basket
Series
Packs Large Packs 0.5 l
1.0 l
1.25-2.5 l
Duchess
1 ppp* 1 ppp
1 ppp 1 ppp
3 ppp
4–7 ppp
Hi Lite
1 ppp 1 ppp
1 ppp 1 ppp
2–3 ppp 3–5 ppp
* ppp = plants per pot.
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How to transplant Torenia?
Don’t bury the plant stem.
Substrate level
Substrate level
Substrate level
Substrate level
This is too deep!
Don’t keep too deep!
But this is better
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General condition after transplanting.
•
Temperature - Day:
18 19 20 21 22 23 24 25 26
- Night:
12 13 14 15 16 17 18 19 20
•
Light intensity : 40―60 KLk
Partial Sun/Shade
Light Shade
Moderate Shade
Heavy Shade
Full Sun
• Keep substrate moisture between the levels 2 and 4
Level 5 SATURATED
Level 4 WET
Level 3 MEDIUM
Level 2 MEDIUM DRY
Level 1 DRY
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Torenia fertigation tips #1.
• Provide 75―125 ppm of nitrogen. • Do not use too much phosphorus!
• You can provide proper amount of N by 0.5―1.0 g/l : 15-5- 30 , 10-3- 25 15-5- 40 , 18-5- 30 , 17-5- 35 . • Give fertilizers with every watering (EC water : 1.2―1.5(1.7). • Optimal EC in the substrate (SME*): 0.9―1.3 mS/cm.
• pH range: 5.5―5.9 (6.0)
pH < 5.8.
5
2 3 4
6 7 8
Torenia plant ready to be sold.
! Don’t forget to provide Ca and Mg every two weeks!
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How to change NPK ?
Calculate & mix!
• NPK rate in your fertilizers 19-19-19.
19-19-19 + 13-0-46
• Your plants need for instance 18-5-30, or 18-10- 30, similar. • Take fertilizers with the N & K only – potassium nitrate (KNO 3 ) . It has NPK – 13-0-46.
• It has NPK – 13-0-46.
• It is possible to mix your NPK fertilizer with the potassium nitrate (KNO3) like 50 % - 50 % . • It if you recalculate 50 / 50 mixture to NPK it will give the rate 16-9,5-32
Low EC.
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Torenia fertigation tips #3.
Add bit more fertilizers
•
EC & pH in the water
EC Lower
Taste soupe before you offer to your guest…
2
4
1
3
5
Is EC & pH Ok?
Yes
Add required quantity of fertilizers
Check EC & pH and adjust pH
Fill the tank up to target volume
Fill the tank with ½ volume
EC Higher
Add bit more water
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Torenia fertigation tips #4.
•
EC & pH in the substrate!
• Check before it too late! • Plant cannot tell you if it needs something, but pH and EC can reveal it. • Check plant health (EC & pH) before plant needs reanimation.
• Substarte pH: 5.5–5.9 • Substarte EC: SME* EC: 1.2–1.75 mS/cm,
One time a week.
* Saturated Media Extraction (SME) ** PourThru method.
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Torenia leaves whitening.
Don’t overwater your Torenia and keep pH within optimal range! Keep the plants out of direct light after transplanting!
Whitening
Normal leave color
Light again!
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Disease management.
Most common diseases.
Disease
Active ingredients (rate in chemical)
Active Ingredient concentration in solution*
Use as prophylactic
iprodione (50%)
1.25 g/l
tetrachloroisophthalonitrile (82.5%)
0.83–1.2 g/l
Botrytis
fenhexamid (50%)
0.5–0,75 g/l
pentachloronitrobenzene (75%)
0.75–1,25 g/l
fludioxonil (250 g/l) + cyprodinil (370 g/l)
0.25–0.5 fludioxonil + 0.37–0.74 cyprodinil
azoxystrobin (200 g/l) + cyproconazole (80 g/l)
0.4 g/l azoxystrobin + 0.16 g/l cyproconazole
azoxystrobin (50%)
0.15 g/l
Pythium
pyraclostrobin (12.8%) + boscalid (25.2%)
0.03–0.07 g/l pyraclostrobin or/and 0.05–0.15 g/l boscalid
propamocarb (600 g/l)
1.8 g/l
+
* Rotate active ingredients (AI). Don’t apply the same AI more than 3 times at row. Check phytotoxicity!
Downey mildew!
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Botrytis management on the Torenia.
Chemical schedule example (for the large packs or 0.5 l pots).
Days 1 2 3 4 5 6 7 8 910111213141516171819202122232425262728293031323334353637383940
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* Rotate active ingredients (AI). Don’t apply the same AI more than 3 times at row. Check phytotoxicity!
Crop timing.
Torenia growing time after the transplanting.
Pot size
6 l hanging basket
Series
Packs
Large Packs 0.5 l
1.0 l
1.25-2.5 l
Duchess
7–8 weeks 7–8 weeks 8–9 weeks 8–9 weeks 8–9 weeks 9–10 weeks
Hi Lite
6–7 weeks 6–7 weeks 6–7 weeks 6–7 weeks 6–7 weeks 8–9 weeks
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Q&A session.
• Thank you for your time. • For more information, please contact your Key Account Manager.
Ivan.Pozdnyakov@ syngenta.com Technical Sales Specialist SA/SEAP
Michael.van_Baekel@ syngenta.com Michael van Baekel Head of Marketing APAC
Gautam.Sangle@ syngenta.com Key Account Manager SA (South Asia) (India, Nepal, Bangladesh)
Mallikarjun.Mangrule @syngenta.com Head of APAC
https://www.syngentaflowers.com/
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