Light Requirements for Colorado Blue Spruce: Daily Minimum, Not Just Seasonal

10 New 6-Ft Spruce, Partial Shade from Maple

Northern NY. Maple casts shade part of day. Spruce need partial to full sun. Does "partial sun" mean part of day? Year-round or growing season only?

Answer

• Light needs = daily direct sun hours, year-round.
• Growing season ~late March to mid-Oct.
• Partial sun = <4 hrs direct sun/day.
• If spruce get >4 hrs/day after maple drops leaves, they're fine.

Care Reminders

Water until freeze. Mulch for insulation. Fall fertilize with mycorrhizae biostimulant for winter root growth.