Dendrobium and Oncidium Flowering Issues: Rest Periods and Repotting

Dendrobium: Not Spiking Despite New Growth

• Reduce watering to bare minimum (misting only).
• Flower spikes often take 2+ months to initiate.
• Stress (dryness) induces flowering—healthy plump canes can withstand it.
• Patience: don't check daily.

Oncidium Alliance: Wrinkled Pseudobulbs

• Shrinkage during dry rest is normal—bulbs firm up when watering resumes.
• Repot in fresh mix when new growth starts (old mix holds too much water).
• Flowering occurs when new growth matures into large pseudobulbs.

Follow-Up: Mini-Dendrobium Specifics

• Leaf loss is normal; some flower on leafless canes.
• Keep dry until new growth appears.
• Humidity tray + light misting 2x/week.

Oncidium Repotting & Root Growth

• Complete mix replacement needed—extra bark chunks aren't enough.
• Use ½-¾" fir bark mix; screen out dust.
• Water only when mix feels dry 2" deep.

Mini-Phal Tips

• High phosphorus + higher light = deeper flower colors.
• Ease of growth depends on parent species in the hybrid.