Mushroom Japanese Cedar

Light Needs

Part Sun to Full Sun

(5+ Hours Direct Sun)

Mature Height

40-60 Feet

Mature Spread

15-25 Feet

Growing Zones

5 to 9

Mushroom Japanese Cedar (Cryptomeria japonica ‘Mushroom’) draws the eye with soft, mounded foliage that shifts from bright green in summer to warm russet tones during the colder months. Arched branches form a neat globe shape over time, delivering a whimsical accent for a patio container or focal point in a garden bed. This low-growing conifer typically reaches around 3 feet tall and wide, giving you all-season appeal without overwhelming nearby plants. Its naturally compact habit means little pruning is needed, and the soft, feathery needles provide a pleasant texture in any landscape. 

This Japanese Cedar proves valuable in a range of settings. It tolerates full sun in moderate climates, partial shade in hotter areas, and doesn’t demand frequent watering once established. Deer usually leave it alone, and disease concerns remain minimal when it’s planted correctly. Use it as a specimen, cluster a few in a border, or spotlight it in a container for instant structure. If you’re aiming for a sense of quiet beauty in the garden or an Asian-inspired theme, this dwarf cultivar fits perfectly.

Mushroom Japanese Cedar Care

Select a site that offers at least four to six hours of sun, though some afternoon shade benefits the plant in regions with harsh summers. Provide a loamy, well-draining soil—add organic matter if needed—to prevent overly soggy conditions that can harm the roots. Water weekly for the first season to develop healthy root growth; reduce to an as-needed schedule during dry spells once the cedar becomes established. An acid-forming or balanced fertilizer in early spring supports new shoots, but avoid heavy feeding. A layer of mulch conserves moisture and regulates the soil temperature around the shallow roots.

Lightly trim only if you prefer a more formal sphere or if you see any damaged stems. Most gardeners simply leave ‘Mushroom’ to maintain its natural, rounded look. If using a pot or planter, check for good drainage and consider occasional root pruning if it becomes root-bound. In colder regions, placing it in a sheltered location helps defend against drying winds and harsh winter conditions.

Mushroom Japanese Cedar Spacing

Allow about 3 feet between plants when lining them up in a hedge or row, ensuring each mound’s open shape stays distinct. For single specimens or spacing in a more relaxed layout, consider 4 feet or more so the branches don’t compete for space. If container growing, pick a pot roughly 14 inches wide and at least 12 inches deep to give the roots enough room—then upgrade gradually as your cedar matures.

Simple Plant Spacing Calculator

Planting Shape

Rectangle Circle Known Area

Length (ft)

Width (ft)

Diameter (ft)

Or enter radius below

Radius (ft)

Known Area (sq ft)

Plant Spacing On-Center (in)

Pattern

Square (grid) Triangular (staggered)

Fill edge gaps (max plants)

Enter area to see results.

Visual Preview

Print / Save PDF

Powered by