Blue Atlas Cedar Identification and Cutting Propagation Guide

Tree Identification

Your 60-foot tree with horizontal branches and weeping lower limbs in San Diego strongly resembles Blue Atlas Cedar (Cedrus atlantica 'Glauca'). Compare with online images for confirmation. Note: cone production is irregular—some years none, some years abundant.

Propagation from Cuttings: A Challenging but Rewarding Project

Conifer cuttings are difficult for beginners. Here's the professional approach:

1. Timing: Early spring, just as new growth emerges (greenwood stage).
2. Cutting prep: 6-inch tips, strip needles from lower 2 inches.
3. Rooting hormone: Use professional-grade IBA (Indole-3-Butyric Acid) at 3,000–8,000 ppm (e.g., Hormodin 2 or 3). Standard nursery powders (0.1–0.8% IBA) are often too weak for conifers.
4. Medium: Soil-less mix (peat/perlite/vermiculite) in deep trays.
5. Environment: High humidity (mist system or sealed chambers), bottom heat 70–75°F, bright indirect light.
6. Monitoring: Check for roots at 6–8 weeks with gentle probing—don't tug.
7. Transplant: Pot rooted cuttings individually; grow 1+ years before outdoor planting.

Greenhouse Advantages

A controlled greenhouse dramatically improves success by maintaining consistent humidity, temperature, and light. If unavailable, a simple cold frame with mist can work for small batches.