Dwarf Alberta Spruce in Pots: Winter Damage and Spider Mites

Root Cause: Undersized Pots and Winter Exposure

18–20" pots are too small for 3–4 ft spruces, especially overwintering above ground in Boston. Roots freeze and desiccate. Repot into larger containers and place in a protected, mulched bed (east side of building) for winter.

Spider Mite Evidence

Fine webbing with sandy granules = spider mites. Dry winter air and stressed plants invite them. Water heavily (2–5 gallons) weekly during hot, dry spells to prevent stress.

Care Regimen

• Fertilize with Holly-tone (espoma) in spring and late summer.
• Prune annually to maintain shape; remove brown foliage promptly.
• Water by weight: saturate, drain, rewater when pot feels light.

Local Expertise

Consult a local garden center for specific pesticide recommendations after pest ID.