Folio № 33 of 36 · in the garden since 2022

Colorado Blue Spruce

Picea pungens

EvergreenConiferFull sun

Bold foliage color and strong apical dominance; ideal for rugged styles but prone to coarse growth.

Zone 8b notesWatch for spider mites (Jul-Aug); Prevent rot in wet Nov-Jan

Visit the Colorado Blue Spruce bench — 2 trees →

Colorado Blue Spruce botanical plate
Picea pungensPlate XXXIII · Mossy Spot Herbarium

The year, as this species lives it

Thirteen phases. Touch any arc — the wheel remembers what each season asks.

Late DormancyEarly SpringMid SpringLate SpringEarly SummerMid SummerLate SummerEarly FallMid FallLate FallEarly WinterMid WinterLate Winterthe yearOF A COLORADO BLUE SPRUCE

Mid Summer · Jul 1 – Aug 10 · happening now

  • WateringMaintain frequent watering. Avoid wet feet by ensuring proper drainage.
  • FertilizationResume light feeding if growth has slowed naturally.
  • Pests DiseaseHigh risk period for spider mites; spray with water regularly to deter.
  • Summer ProtectionMaintain shade and wind protection.
  • Wound ManagementSeal fresh cuts to prevent sap loss and desiccation.
  • Deadwood CarvingContinue as needed but avoid carving during extreme heat.

click another arc to travel the year →

All thirteen phases, side by side →

The care sheet

The constants — what stays true in every season.

Placement

Full sun

Full sun enhances blue coloration.

Watering

Moderate

Allow slight drying between watering; avoid waterlogging.

Feeding

Balanced

Avoid high nitrogen; encourages coarse growth.

Pruning

Structural in spring, maintenance in summer

Thin regularly to allow light into interior.

Wiring

Spring or Autumn

Wood is stiff; wire with care and in stages.

Repotting

Every 2-4 years

Repot every 3 years to refresh soil and manage vigor.

Propagation

Cuttings or seed

Best propagated from seed or grafted onto vigorous rootstock.

Winter

Protect from drying winds; foliage may discolor.

Summer

Tolerates heat but not drought; mulch in summer.

On the bench · 2

Every Colorado Blue Spruce in the garden, oldest hands first.

Colorado Blue Spruce 1

Colorado Blue Spruce 1

№ 007since ’22

Colorado Blue Spruce 3

Colorado Blue Spruce 3

№ 039since ’24

← Previous folioJapanese Snowbellfolio 33 of 36 · back to the libraryNext folio →Engelmann Spruce

Paths onward

CollectionThe Colorado Blue Spruce benchAll 2 trees, the oldest here since 2022.The yearFull seasonal calendarColorado Blue Spruce’s thirteen phases, side by side.TodayThe AlmanacMid Summer is underway — see what the garden asks now.
Mossy Spot · PNW · Zone 8bgrow slowly
Mossy Spot❧The Species Library❧Colorado Blue Spruce
73° Clear · Mid Summer
Sign in