Chrysanthemum Multicaule Yellow Seedling Tray

For best results with Chrysanthemum Multicaule Yellow, plant one or two seedling plugs per 4-inch or three to five per 10-inch container. Use well-drained soil with a pH of 6.0-7.0, EC of 1.5-2.5 mS/cm, temperatures of 60-70 daytime and 50-60 nighttime, and medium feed (200-250 ppm N) with a well-balanced fertilizer. Provide full sun or partial shade. Pinch once or twice and use B-Nine or Cycocel if needed. Watch for aphids, spider mites, thrips, white flies, botrytis, powdery mildew, and root rot. 

Yellow flowers bloom from summer to early fall.

Pinch once or twice. Pinch first when the seedling is 6-8" tall and again 2-3 weeks later.

Space containers for adequate airflow and sunlight penetration around the base and foliage of each plant. For Chrysanthemum Multicaule Yellow, we recommend 18" between containers, adjusting for your  plants and space. Prioritize good circulation to prevent the spread of disease. 

Grow bushy plants and prevent legginess with good cultural practices, including proper fertilizer rates, watering, and light. Use B-Nine or Cycocel as needed according to the label's instructions.

Watch for aphids, spider mites, thrips, and whiteflies. Use preventative measures in your greenhouse, including sanitary practices and allowing the soil to dry slightly between waterings. Implement an Integrated Pest Management plan to prevent severe damage from infestations. 

Aphids are small, soft-bodied insects that cause damage by sucking sap from plant tissue. They reproduce quickly and are particularly attracted to young growth. Curling and yellowed leaves, stunted growth, and stickiness on leaves are signs of an infestation. These insects also spread diseases and reproduce rapidly. Use biological controls or horticultural oils to discourage and kill aphids.

Spider Mites are tiny pests that cause stippling, yellowing, and webbing on foliage by feeding on plant sap. They flourish in warm, dry environments. Use correct water and fertilizing practices; over-fertilizing can attract spider mites. Proper humidity levels, predatory mites or ladybugs, and insecticidal soaps or oils may prevent or address a spider mite infestation.

Thrips are tiny insects that eat plant tissue and can transmit viruses. Watch for silvery-white streaks or black spots on foliage and distorted growth. Use natural predators (like predatory mites), insecticidal soap, neem oil, and sticky traps to control infestations and prevent spread.

Whiteflies are small, winged insects that eat plant sap and cause yellowed leaves and stunted growth. Severe infestations can lead to plants dying. Prevent infestations by sanitizing surfaces and tools and removing debris. Introduce natural predators and use sticky traps to control populations. Insecticidal soaps and oils are also effective against this pest.

You may see Botrytis, Powdery Mildew, and Pythium Root Rot. Provide good airflow in your greenhouse, water at the base of each plant and allow the soil to dry between waterings, and implement an Integrated Pest Management Plan to prevent significant damage from diseases to your seedling plugs.

Botrytis is a common fungal disease that causes brown spots on stems, leaves, and flowers. Remove and destroy affected plants, maintain appropriate humidity levels, and apply fungicides with boscalid, fenhexamid, or iprodione to control the spread. Water plants in the morning and allow the soil to dry slightly between waterings.

Powdery Mildew is a fungal disease that thrives in humid conditions, appearing as a white or gray coating on foliage and flowers. Provide good airflow in your greenhouse. We recommend horizontal airflow fans to help control humidity levels alongside a dehumidifier or manual venting. Remove and destroy infected plants and apply fungicides as needed or preventatively. Look for the active ingredients myclobutanil, trifloxystrobin, or potassium bicarbonate to combat Powdery Mildew threatening your seedling plugs.

Pythium Root Rot is a fungal diseases that cause stunted growth, yellowed leaves, and plant death by eating away at the plant's roots. Use well-draining planting media and provide good airflow and spacing in your greenhouse. Allow the soil to dry slightly between waterings and apply fungicides with active ingredients abamectin, spinosad, or imidacloprid to combat this disease.

We recommend planting one or two seedling plugs per 4-inch or three to five per 10-inch container. Use well-drained soil and completely bury the ellepot centered or evenly spaced in the container. Water after transplanting.