Saxifraga arendsii

Growing in Pots, Balconies & Indoors

Mossy saxifrage forms a soft green cushion topped with spring flowers and is a classic alpine-trough and rockery plant. The grower confirms it grows indoors and in pots; keep it in a bright, cool, sun-free spot with a gritty, moisture-holding mix and it makes a charming small container plant.

Quick Details

• Container Size: A shallow, wide pot or alpine trough – it spreads into a low cushion
• Indoor Suitability: A workable houseplant in a bright, cool, sun-free spot; it dislikes hot, dry rooms
• Best Spot: Half to full shade – it burns in hot sun; bright but cool indoors
• Soil & Drainage: Gritty yet moisture-retentive alpine mix – potting soil with grit plus some humus
• Watering in Pots: Keep evenly, lightly moist (average water); never bone dry and never waterlogged

Indoors & On the Windowsill

• A workable houseplant: The grower confirms indoor growing. It needs bright but cool, sun-free conditions and a moist, gritty mix – keep it away from direct sun and dry heat.
• Windowsill growing: A cool, bright north or east sill suits its cushion form; strong sun through glass scorches it.
• Cool lover: As an alpine it prefers cool, humid, airy conditions and a cool winter – it struggles in a warm, dry living room.

On a Balcony or Patio

• Light & shelter: A cool, part-shaded balcony or patio in a trough is ideal; shade it from hot afternoon sun and keep the cushion from drying out.
• Practicalities: Small, shallow pots dry fast – check often in warmth, but ensure sharp drainage so the crown never sits wet.

Choosing the Pot, Soil & Long-Term Care

• Pot & drainage: A shallow pot with strong drainage holes and no standing-water saucer; grit at the base and a grit topdressing protect the cushion.
• Potting mix: A gritty, free-draining alpine mix that still holds some moisture – potting soil with grit and a little humus.
• Feeding: Feed sparingly in the growing season; alpines want lean conditions.
• Repotting: Divide and refresh the mix every couple of years, replanting healthy cushion sections.

Bloom & Flower Guide

Quick Details

• Bloom Season: Spring to summer
• Flower Appearance: Small, five-petalled star-shaped flowers in red, purple, pink or white, each with a yellow centre, carried on slender stems above the foliage
• Edibility: Ornamental — grown as a flowering ground cover; the flowers are not eaten

Detailed Blooming Overview

Mossy saxifrage forms low, cushion-like mounds of fine evergreen foliage, and in spring and summer it sends up wiry stems topped with small, starry blooms that lift well clear of the leafy carpet. Grown as a ground cover, it is at its best when the whole cushion lights up with colour.

Flower Characteristics

• Five petals per flower, in red, purple, pink or white, with a yellow inner eye.
• Flowers are held in loose inflorescences on slender upright stems above the mat of foliage.

Bloom Care & Thinning

• Managing the bloom: Shear off the spent flower stems once the display fades to keep the cushion neat and tidy.
• Position: A spot with some shade and reliably moist, well-drained soil gives the longest, best-coloured flush.
• Pollination: The open flowers are visited by bees and other insects.