Juniperus procumbens 'Nana' (Dwarf Japanese Garden Juniper) Bonsai Care Timeline

Bonsai illustration

Juniperus procumbens 'Nana' is a dwarf cultivar of a prostrate juniper native to Japan (originally from coastal and mountainous regions). In nature, the species spreads low along rocky slopes, cliffs, and open ground, tolerating poor soil, salt spray, drought, and full sun while forming dense, mounding mats with bright green, needle-like juvenile foliage, which it keeps throughout its life.

This cultivar is compact, slow-spreading, and highly popular for its forgiving nature, flexible branches, and classic "mall bonsai" look when styled properly. It's ideal for beginners due to vigorous growth and tolerance for pruning, suiting cascade, semi-cascade, or informal upright styles. In the USA, it's one of the most commonly sold and grown junipers for outdoor bonsai.

Evergreen conifer; outdoor

At a glance
  • Type: Evergreen conifer; outdoor
  • Light: Full sun (6+ hours daily).
  • Watering: Deeply when top ½ inch dries (every 2–4 days).

Skip to a season:

Spring (Mid-March – Mid-May)Summer (Mid-May – August)Fall (September – Mid-November)Winter (Mid-November – Early March)

Spring (Mid-March – Mid-May)

Bonsai in spring — illustration

Goal: Encourage vigorous extension and density.

  • Light: Full sun (6+ hours daily).
  • Watering: Deeply when top ½ inch dries (every 2–4 days).
  • Fertilizing: Balanced organic every 3–4 weeks from mid-April.
  • Pruning: Pinch/pull new buds by hand to promote branching. Thin the interior with scissors yearly and remove downward-growing shoots — pads clog and die back inside.
  • Wiring: Light wiring only; avoid heavy bending while new growth is soft (bark slips easily).
  • Repotting: Every 2–3 years early spring; draining mix (akadama/pumice).
  • Pests/Diseases: Spider mites, bagworms; neem preventive.
  • Notes: Juvenile foliage dominant; pinching prevents legginess.

Summer (Mid-May – August)

Bonsai in summer — illustration

Goal: Compact growth in warmth.

  • Light: Full sun; light shade in extreme heat.
  • Watering: Daily during hot periods.
  • Fertilizing: Balanced; ease in peak heat.
  • Pruning: Continuous pinching of new shoots.
  • Wiring: Check wire monthly.
  • Repotting: Avoid.
  • Pests/Diseases: Mites in dry air; mist and hose regularly.
  • Notes: Fast and forgiving in summer.

Fall (September – Mid-November)

Bonsai in fall — illustration

Goal: Refine pads and structure.

  • Light: Full sun.
  • Watering: Every 3–5 days.
  • Fertilizing: Low-nitrogen early; stop mid-October.
  • Pruning: Light thinning.
  • Wiring: Ideal for major wiring/styling.
  • Repotting: Avoid.
  • Pests/Diseases: Low.
  • Notes: Good season for adjustments.

Winter (Mid-November – Early March)

Bonsai in winter — illustration

Goal: Dormancy maintenance.

  • Light: Bright sun.
  • Watering: Every 7–14 days.
  • Fertilizing: None.
  • Pruning: Minimal.
  • Wiring: Wire OK with care; avoid heavy bends in deep cold (branches brittle).
  • Repotting: Avoid.
  • Pests/Diseases: Inspect inner foliage for scale and overwintering spider mites; horticultural oil on a mild day if found.
  • Protection: Mulch pot; shelter extreme cold <10°F.
  • Notes: Hardy in Zone 7. Foliage bronzes noticeably in frost — normal frost protection; it greens up again in spring.

Zone 7 Tips: More vigorous and beginner-friendly than Shimpaku; full sun and hand-pinching key for tight pads.

Supplies for your trees

These guides are how we grow our own trees — and the supplies we use are the ones we sell: Bonsai Shoes training pots · Wire Condo wire caddies · Bonsai trees & pre-bonsai · Bonsai soil. Questions about your tree? Contact us.