Ons. Red Silk

A Big-Flowered Red Oncidium Built for Windowsills

A classic Oncidium-alliance hybrid that delivers massive, cascading sprays without needing an entire greenhouse to do it. It grows with remarkable vigor, making it an easy favorite for home growers.

Each bloom opens in deep velvety crimson to rich mahogany-red, offset by a broad, flaring lip marked with a dusting of crisp white and bright yellow in the mask. The petals sit flat and star-like, creating a dense, dramatic shower of long-lasting flowers.

The real draw here is how much bloom power this hybrid packs into a remarkably manageable footprint. The flower spikes arch naturally, holding dozens of heavy, waxy blossoms that hold their color for over a month on the bench. It moves seamlessly between intermediate and warm home conditions, making it one of the most reliable and rewarding red Oncidiums you can put on a sunny windowsill.

Quick Care Guide

• Light: Bright, indirect light. An east window or shaded south window keeps leaves a healthy lime green.

• Water: Water thoroughly as the media approaches dryness; do not let pseudobulbs shrivel completely.

• Temperature: Nights 58–65°F, days 70–86°F.

• Fertilizer: Balanced orchid fertilizer, fed lightly every two to three weeks during active growth.

• Mature size: Pseudobulbs and leaves reach 12 to 16 inches tall; inflorescences arch 18 to 24 inches.