Repotting guide

When & how to repot Aleutian mountain heather (Phyllodoce aleutica)

Also called Aleutian mountain heather, Yellow mountain heather, Cream mountain heather.

More about aleutian mountain heather

About Aleutian mountain heather

Phyllodoce aleutica · also called Aleutian mountain heather, Yellow mountain heather · flowering

Aleutian mountain heather is a distinctive low-growing ericaceous subshrub native to the Aleutian Islands, Alaska, Japan, and Kamchatka, bearing creamy-yellow to pale greenish-white urn-shaped flowers — unusual within the pink-purple Phyllodoce genus. It forms compact, heath-like mats and demands cool, moist, acidic conditions, making it a specialist plant for cold-climate rock gardens.

Mature size: 15–25 cm tall (6–10 in), spreading to 30–50 cm wide over several years

Watch for — Root rot from summer waterlogging: Despite needing consistent moisture, the soil must drain freely. Stagnant water at the roots, particularly in warm summers, causes Phytophthora root rot. Raised beds with a gritty, free-draining mix are the most reliable cultivation approach.

How to tell aleutian mountain heather needs repotting

Repotting on a calendar is less reliable than reading the plant. For aleutian mountain heather, watch for these signs:

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot aleutian mountain heather

Every 2–3 years, into bone-dry mix. Aleutian mountain heather's growth habit — compact, spreading mat-forming subshrub with densely-set narrow, heath-like leaves and erect flowering shoots — sets the pace. Aleutian mountain heather is a distinctive low-growing ericaceous subshrub native to the Aleutian Islands, Alaska, Japan, and Kamchatka, bearing creamy-yellow to pale greenish-white urn-shaped flowers — unusual within the pink-purple Phyllodoce genus. It forms compact, heath-like mats and demands cool, moist, acidic conditions, making it a specialist plant for cold-climate rock gardens.

What size pot to step aleutian mountain heather up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Aleutian mountain heather stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot aleutian mountain heather

Spring or summer, while aleutian mountain heather is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting aleutian mountain heather

Repot dry. Do not water aleutian mountain heather for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty strongly acidic, humus-rich, gritty and well-drained ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set aleutian mountain heather at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep aleutian mountain heather completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for aleutian mountain heather

Aleutian mountain heather wants strongly acidic, humus-rich, gritty and well-drained. Requires strongly acidic soil (pH 4.5–5.5). Ericaceous compost blended with coarse horticultural sand or perlite (50:50) creates ideal conditions. Top-dress annually with composted pine bark or acidic leaf mold. Never use lime or chalk in the growing medium. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting aleutian mountain heather — frequently asked questions

How often should you repot aleutian mountain heather?

Every 2–3 years, into bone-dry mix for aleutian mountain heather. Repot aleutian mountain heather every 2–3 years into a snug pot of strongly acidic, humus-rich, gritty and well-drained, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does aleutian mountain heather need?

When is the best time of year to repot aleutian mountain heather?

Should you water aleutian mountain heather after repotting?

No — not straight away. Repot aleutian mountain heather into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise aleutian mountain heather after repotting?

Not immediately. Wait about 3 weeks after repotting aleutian mountain heather. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.