Tagetes patula nana
Deep dive into technology
Syngenta Flowers APAC Technical Webinar for Tropical Regions 16-07-2025 2 p.m.
Inka Orange 70041091
French Marigold portfolio #1.
Series
Pot size
Height* Specific features
Colors
Vigorous habit, unique colors. Large ball shaped flower, good earliness.
Alumia
Packs / 9–20 cm 25–30 cm
7 & 1 mix
Cresta
Packs / 9 cm 23–28 cm
8 & 1 mix
Genetically compact with large flowers 5 & 1 mix * Garden width is the same for all varieties 25―35 cm
Happy
Packs / 9 cm 20–25 cm
Page 55 – 2024/25 Catalog
Floranova
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French Marigold portfolio #2.
Alumia
Cresta
Happy
7 colors & 1 mix
8 colors & 1 mix
5 colors & 1 mix
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Triploid Marigold portfolio.
Series
Pot size
Wight
Height Specific features
Colors
Nearly African-sized flower with nearly French Marigold timing.
3 & 1 mix
Endurance
11–19 cm 25–35 cm 25–35 cm
More branching and vigorous habit.
Zenith
11–19 cm 30–35 cm 30–35 cm
6 & 1 mix
These series are suitable for both pots and landscapes.
Page 55 – 2024/25 Catalog
Floranova
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French Marigold in the landscape.
Tagetes patula nana & Tagetes triploid are the ultimate crops for the landscape. This is one of the most efficient crops if you intend to cover a very big area.
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5 elements of success with the Tagetes seedings.
Fast growing crop.
Plant protection.
pH above 5.8.
Feed your plants well.
Avoid watering in cold.
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https://www.youtube.com/@SyngentaFlowersAPAC/videos
Sowing.
• Suggested tray size – 128 cell • Seed – place 1 seed per cell • Do I need to cover the seed? Yes • Light is not required for the germination.
• Soil Temp: 20 ―22 0 C
15 16 17 18 19 20 21 22 23 24 25 26
Fast growing crop.
• Germination takes only 3―5 days. Don’t be late with transplanting.
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Germination. Substrate conditions.
pH should be higher.
• Substrate and water pH: 5.8―6.2
5
2 3 4
6 7 8
• SME: 0.5―0.75 mS/cm.
Level 5 SATURATED
Level 4 WET
Level 3 MEDIUM
Level 2 MEDIUM DRY
Level 1 DRY
pH above 5.8.
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Substrate type #1.
• Suitable substrate components: peat > cocopeat > wood fiber peat > rice husk > composts > natural soils. With particle size 0―5 mm. Most of available substrates is suitable for tagetes. • Add 20 % leavening agent: perlite > sand > zeolite > vermiculite • Substrate mixture examples : - 80 % cocopeat + 20 % perlite, - 60 % cocopeat + 20 % peat + 20 % perlite. - 60 % cocopeat + 20 % natural soil + 20 % perlite. - 60 % cocopeat + 20 % natural soil + 20 % vermiculite. • Every substrate is fine if you provide proper pH, antiseptic treatments or protection.
Even natural components are applicable
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Substrate type #2.
• You can achieve success even with natural substrate components. • But use the antiseptic treatments : - hot water / vapor application (+ 80 0 C), - chemical treatment (KMnO4 – 30―50 mg/l, propamocarb (Previcur), fludioxonil), - biological protection ( Gliocladium catenulaturm, Bacillus subtilis, Bacillus amylolquefaciens, Streptomyces sp. K 61, Streptomyces lydicus strain WYEC 108, Trichoderma harzianum, Trichoderma virens, Trichoderma asperellum, Trichoderma gamsii… ).
There are many commercially available biological product are available on the market
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Young Plants development.
• Temperature - Day:
17 18 19 20 21 22 23 24 25
Suboptimal range
- Night:
17 18 19 20 21 22 23 24 25
• Light intensity : 25―30 KLk
Moderate Shade
Heavy Shade
Partial Sun/Shade
Light Shade
Full Sun
• Keep substrate moisture between the levels 2 and 4
Fast growing crop.
Level 5 SATURATED
Level 4 WET
Level 3 MEDIUM
Level 2 MEDIUM DRY
Level 1 DRY
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Feed your plants well. Feed your Tagetes young plants properly. • Provide 75―125 ppm of nitrogen (N). • You can provide proper amount of N by 0.5―0.85 g/l of 18- 5 - 18, 15 -3- 15 or similar. • Optimal EC in the water 1.5―1.7* • Optimal EC in the substrate (SME**): 0.5―0.75 mS/cm. • Don’t change EC more than 0.3 mS/cm. • Substrate and water pH: 5.8―6.2 2 3 4 5 6 7 8
Feed your plants well.
* EC in the water depends on the light intensity and temperature.
Start feeding your plants when they just begin to sprout true leaves
** Saturated Media Extract.
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Don’t forget about Ca/Mg Make your plants strong!
Pay attention Ca and Mg fertigation. NPK fertilizers are poor with Ca and Mg
Apply Ca(NO 3 ) 2 + Mg(NO 3 ) 2 every 3
rd ―5 th watering
week 1
week 2
week 3
week 4
1.7
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
1.0 1.0
0.7
Water EC, mS/cm
0.4-0.5
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Keep pH above 5.8.
What’s happened to these plants?
• Tagetes plants are in a very depressed state due to low pH, toxic effects of iron and manganese. A bronze tint is visible on some leaves.
How to avoid this?
• Keep pH in the proper range 5.8―6.2 . • Proper Ca/Mg application will help to avoid Fe/Mn .
pH above 5.8.
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Avoid watering in cold.
What happened with this seedling?
• Suppressed growth of apical meristems due to overhead night watering at low temperatures.
How to avoid this?
• Don’t use overhead watering to the night.
• Increase temperature before watering.
Avoid watering in cold.
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Tagetes is the fast-growing crop. Don’t be late with transplanting. Seedling development takes 3 or 4 weeks only!
Fast growing crop.
Days 1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272829303132333435
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Transplanting time. What is the proper stage for the Tagetes?
* Young plant production takes only 3 ―4 weeks. Two pares of true leaves is the best stage*.
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Transplanting technique. Don’t be afraid to put the Tagetes seedlings deeper.
Possible but not good enough.
Correct.
Tagetes brings adventitious roots quite easily.
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Growing condition. Keep pH higher!
General growing condition
• Temperature: Day: Night:
15 16 17 18 19 20 21 22 23 24 25 26
15 16 17 18 19 20 21 22 23 24 25 26
• Light intensity (40―60 KLk).
Partial Sun/Shade
Moderate Shade
Full Sun
Light Shade
Heavy Shade
• Increase pH in the water and the substrate up to : 6.1―6.5!
6
2
3
4
5
7
8
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Don’t water in cold. Don’t overwater!
Provide good place for the plants
• Mind a GAP! • Slope or & Drainage • Let the substrate to dry between irrigation.
Level 5 SATURATED
Level 4 WET
Level 3 MEDIUM
Level 2 MEDIUM DRY
Level 1 DRY
Weakened plants of Tagetes, grown in conditions of excessive substrate moisture.
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Finishing stage fertigation tips.
Feed your Tagetes well.
• Provide 12 5―175 ppm of nitrogen. • Do not use too much phosphorus! • You can provide proper amount of N by 1 .0―1.2(1.5) g/l of 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*): 1.5―2.1 mS/cm.
Feed your plants well.
• pH range in the water: 6.1―6.6
5
2 3 4
6 7 8
! Don’t forget to provide Ca and Mg every 5 th or 6 th watering!
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5 th component of success – Alternaria protection
• Most dangerous Tagetes disease is Alternaria.
Disease
Active ingredients (rate in chemical)
Active Ingredient concentration in solution g/l* 3.2 g/l mancozeb + 0.2 g/l mefenoxam 0.4 g/l azoxystrobin + 0.16 g/l cyproconazole
Use as profilactik
+
mancozeb (640 g/kg) + mefenoxam (metalaxyl-M) (40 g/kg)
azoxystrobin (200 g/l) + cyproconazole (80 g/l)
Alternaria
+
fludioxonil (25 g/l)
0.05 g/l 0.04 g/l 1.25 g/l
difenoconazole (25 g/l)
iprodione (50%)
tetrachloroisophthalonitrile (82.5%)
0.83–1.2 g/l 0.5–0,75 g/l 0.75–1,25 g/l
Botrytis
fenhexamid (50%)
pentachloronitrobenzene (75%)
* Don’t forget to check phytotoxicity!
* Rotate active ingredients (AI). Don’t apply the same AI more than 3 times at row. Check phytotoxicity!
Alternaria spores
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Tagetes patula from start to finish.
Week Stage:
1
2
3
4
5
6
7
8
9
10
11
germination
seedlings development
tranplanting
Blooming
Chamber:
optional 20—22 20—22
Temperature day, 0 C Temperature night, 0 C Substrate humidity, 1—5 Tray/pot type → Spacing, cm
19—20(25) 19—20(22)
18—19(25) 18—19(23)
5
2—4
2—4
288-cells 5.8—6.2
pots 10—13
Substrate pH, 1—14
6.1—6.5
2
1.7
1.7
1.7
1.5
1.3
1
Water EC, mS/cm
0.5
Ca+Mg application (↑) Substrate EC (SME), mSm/cm
0.5 0.5
0.5—0.75 75—125
1.5—2.1 125—175
Fertifation (N), ppm
— —
NPK rate, & Ca+Mg application (↑)
15–3–15, 17–5–17
10–5–17, 15-10-35
Light intensity, KLk
not required
20—30
40—60
Day length, hours
— —
natural day length
natural day length
pinching
not need
not need
B-Nine WSG at 2,500–5,000 ppm
PGRs
—
not need
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Q&A session.
• Thank you for your time. • For more information, please contact your Key Account Manager.
Amjad.Iqbal@syngenta.com Key Account Manager SEAP (South East Asia & Pakistan) (Pakistan, Thailand, Vietnam, Indonesia, Malaysia, Singapore, Phillipines, Cambodja, etc
Ivan.Pozdnyakov@syngenta.com Technical Sales Specialist SA/SEAP
Gautam.Sangle@syngenta.com Key Account Manager SA (South Asia) (India, Nepal, Bangladesh)
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https://www.syngentaflowers.com/
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