Category: Plant seeds


Color-filled Zahara has 20% larger flowers than the market leader, plus an array of unique choices, including award-winning Starlight Rose as well as the first Yellow, the first Scarlet and the first well-balanced Mixture in a zinnia of this type. Superior disease tolerance makes Zahara an excellent choice in the landscape where Z. elegans or vinca varieties have failed in the past. Heat-loving plants have very low water needs, and are outstnading in sunny, hot and dry conditions. This all-around winner assures big retail impact and care-free, season-long shows in landscapes and containers.

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Zinnia Zahara
(Zinnia Marylandica)


Approximate Seed Count: 11,300 to 17,000/oz. (400 to

Plug Tray Size: Can be produced in 200, 288 or similar cell size plug trays. Cover the seed with a medium layer of vermiculite at sowing.

Germination takes approximately 2 to 3 days
Germination temperature: 68 to 72°F (20 to 22°C)

Light: Light is not required for germination.

Relative humidity: Maintain 95 to 97% relative humidity (RH) until cotyledons emerge.

Plug Production


Use a well-drained, disease-free media with a pH range of 5.5 to 6.0, and EC less than 0.75mmhos/cm (2:1 extraction).

Stage 2

Temperature: 70 to 75°F (21 to 24°C) days; 60 to 65° F (16 to 18°C) nights

Light: Can be up to 2,500 f.c. (26,900 Lux) during
Stages 2 and 3.

Media Moisture: Keep the media medium (level 3) to medium wet (level 4).

Fertilizer: Apply fertilizer at rate 1 (less than 100 ppm N/less than 0.7 mS/cm EC) with a nitrate-form fertilizer with low phosphorous.

Stage 3

Temperature: 70 to 75°F (21 to 24°C) days; 60 to 65° F (16 to 18°C) nights

Media Moisture: Keep the media medium wet (level
3) during Stages 3 and 4.

Fertilizer: Increase the fertilizer rate to 2 (100 to 175 ppm N/0.7 to 1.2 mS/cm EC)

Maintain a media pH of 5.8 to 6.2 and EC at 0.7 to 1.0 mS/cm (1:2 extraction).
Stage 4

Temperature: 65 to 70°F (18 to 21°C) days; 60 to 65° F (16 to 18°C) nights

Light: Light levels can be up to 5,000 f.c. (53,800 Lux)
if temperatures can be maintained.

Fertilizer: Same as Stage 3.

Plant Growth Regulators

PGRs are generally not required during plug production. If needed, plants can be treated once during the plug stage at about 10 to 14 days after sowing with a foliar spray of B-Nine/Alar (daminozide) at 1,250 to 2,500 ppm (1.5 to 3 g/l 85% formulation or
2 to 3.9 g/l of 64% formulation).

Growing On to Finish

Container Size

Zahara can be produced in 306 premium packs,
1801s, 4-in. (10-cm) pots or similar size containers.


Use a well-drained, disease-free media with a pH of
5.5 to 6.2 and a medium initial nutrient charge.


Night: 60 to 65°F (16 to 18°C) Day: 65 to 70°F (18 to 21°C) Light
Keep light levels as high as possible while maintaining appropriate temperatures.


Starting 1 week after transplant, apply fertilizer at rate
3 (175 to 225 ppm N/1.2 to 1.5 mS/cm) using predominantly nitrate-form fertilizer with low phosphorus. If needed, alternate with a balanced ammonium and nitrate-form fertilizer to encourage growth and balance the media pH. Maintain the media EC at 1.50 to 2.00 mS/cm and pH at 5.8 to 6.2.

Maintain optimal media moisture (not too wet or too dry). Avoid overhead irrigation. Irrigation should take place during times when foliage will dry quickly, to prevent any disease incidence.

Plant Growth Regulators

B-Nine/Alar (daminozide) at 3,500 ppm (4.1 g/l 85% formulation or 5.5 g/l of 64% formulation) applied twice as a foliar spray will control the plant growth. First application can be done 1 week after transplant, followed by a second application 7 to 10 days later.

Northwestern Europe: Zahara will require less PGRs under northwestern European conditions. Can use 2 applications of B-Nine/Alar (daminozide) at 1,600 ppm (1.9 g/l 85% formulation or 2.5 g/l of 64% formulation).

Crop Scheduling

Sow to transplant: Approximately 3 weeks

Transplant to flower: 8 to 9 weeks in Spring,  5 to 6 weeks in Summer

Total crop time (sow to flower): 11 to 12 weeks in
Spring, 8 to 9 weeks in Summer
Crop time will be shorter under long days than under short days.

Common Problems

Insects: Monitor for Aphids early in production, and
Thrips during flowering.

Disease: Avoid high humidity and condensation in the greenhouse, as these conditions are favorable for Botrytis and Powdery Mildew incidence.

“Information copied from the breeder.
Muller will not accept any liability for failure and/or damage as a consequence of incorrect and/or inexpert cultivation by or on behalf of the Buyer.”

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