About this product
Full description
Fine 2-6mm horticultural grit for alpines, succulents, top-dressing, and free-draining potting mixes
Our Alpine Grit is a beautifully fine 2-6mm aggregate — small enough to work as a top-dressing on pots and alpine troughs, sharp enough to give sempervivums, saxifrages, and cottage pinks the drainage they need to thrive, and versatile enough to have a genuinely useful place in almost any gardener's shed. It's one of the most useful materials we sell — once you start using horticultural grit, you find dozens of jobs for it.
Natural Colour Variation
Alpine grit is a natural blended aggregate, and colours vary with stock. Usually you'll find a mix of blacks, whites, pinks, and greys — a lively speckled finish that looks lovely as a pot top-dressing or trough mulch. Occasionally the blend runs to browns and greys, or to warm golds and buffs. If the exact colour matters to your project (a specific alpine trough finish, a display planting, matching existing decoration), get in touch before ordering and we'll tell you what's currently in stock. We're a small farm shop and we can always check for you.
Ten Genuine Uses in the Garden
- Alpine plants — sempervivums, sedums, saxifrages, alpine pinks (Dianthus), and gentians all need sharp drainage. A grit collar around the crown prevents winter rot; grit-heavy potting mix keeps roots healthy year-round
- Succulents and cacti — mixed roughly 1 part grit to 2 parts peat-free compost creates the free-draining medium succulents need to prevent overwatering
- Alpine troughs — traditional stone or hypertufa troughs planted with alpines aren't complete without a grit mulch. It looks right, protects the crowns, and reduces moss
- Rockery construction — use as drainage layer beneath rockery plants and as a decorative mulch on the surface
- Pot top-dressing — a 1-2cm layer on any pot improves appearance dramatically, reduces splash-back on leaves, prevents moss and algae, and deters vine weevil adults from laying eggs in the compost
- Compost amendment for grit-loving plants — mixed with peat-free multipurpose compost, alpine grit transforms it into a suitable medium for Mediterranean herbs, lavender, alpines, and drought-tolerant perennials
- Seed sowing cover — a thin layer of alpine grit over small or slow-germinating seeds prevents surface algae, keeps seed in contact with compost, and looks tidy in a seed tray. Also useful for stratifying seeds that need winter cold
- Bulb planting collars — a handful of grit around each bulb aids drainage and helps deter slugs from tender emerging shoots
- Container drainage layer — a shallow layer at the base of decorative pots helps with drainage, particularly useful in pots that will be watered heavily
- Decorative finishing — a natural, softer alternative to slate or coloured aggregates for finishing troughs, pot displays, and small ornamental features
Which Package Size Should You Choose?
We sell alpine grit in seven package sizes to suit every project — from a handful of decorative pot top-dressings to full landscape jobs. Rough guidance:
- 5 x 25kg Handy Bags (125kg total) — ideal for the enthusiastic pot gardener; enough for around 30-50 medium pots top-dressed at 1-2cm, or one alpine trough with drainage layer
- 10 x 25kg Handy Bags (250kg total) — suits multiple alpine troughs, a small rockery, or a household that uses grit regularly across many pots
- 20 x 25kg Handy Bags (500kg total) — a substantial rockery project, extensive alpine trough collection, or a small garden business/nursery
- 40 x 25kg Handy Bags (1000kg total) — large landscape projects, garden centres, or nurseries with a genuine ongoing need
- Midi Bulk Bag (~500kg) — delivered in a single crane-offloaded bag; suits significant landscape or garden projects where the delivery vehicle can access
- Standard Bulk Bag (~750kg) — mid-scale professional projects; single delivery for large rockeries or extensive top-dressing
- Jumbo Bulk Bag (~1000kg) — BEST BUY — best value per kilogram; for full landscape projects, larger nurseries, or long-term multi-project use
Handy Bags are individual 25kg sacks — easier to handle, store, and move around, but a slightly higher per-kilogram cost than bulk bags. Bulk bags offer the best value but require space to store and often a delivery route the vehicle can access. If you're unsure which suits your project, get in touch.
How to Use
- For pot top-dressing: After planting, spread a 1-2cm layer of grit over the compost surface, right up to the pot rim. Firm gently. Water — the grit will settle
- For compost amendment (grit-loving plants): Mix roughly 1 part grit with 2-3 parts peat-free compost for alpines and succulents, or 1 part grit with 4 parts compost for Mediterranean herbs and lavender. Blend thoroughly before potting
- For alpine trough/rockery drainage: Add a 3-5cm drainage layer at the base of the trough before adding gritty compost. This prevents waterlogging in wet winters
- For seed sowing cover: After sowing small seeds on the compost surface, cover with the thinnest layer of grit — just enough to hide the seeds. Water carefully to settle
- For bulb collars: When planting bulbs, add a handful of grit around and slightly over the bulb before backfilling with soil. Improves drainage and deters slugs from tender emerging shoots
- For rockery mulch: Spread a 2-3cm layer around alpine plants once established. Refresh occasionally as needed
Product Specifications
| Product | Alpine Grit |
| Grade | 2-6mm horticultural grit |
| Colour | Natural mix — typically blacks, whites, pinks, greys; occasionally browns and greys or golds and buffs (varies with stock) |
| Material | Natural stone aggregate |
| Package Options | 7 sizes from 5 x 25kg Handy Bags to 1000kg Jumbo Bulk Bag |
| Ideal For | Alpine plants, succulents, cacti, pot top-dressing, seed sowing, compost amendment, bulb collars, rockeries |
| Application Rates | Top-dressing: 1-2cm layer · Compost mix: 1:2-3 grit to compost · Drainage layer: 3-5cm |
| Delivery | UK mainland — bulk bags may require crane offload; contact us for delivery details |
| Storage | Store dry to prevent settling. Cover bulk bags to keep clean |
Perfect for Alpine and Succulent Growers
If you're growing sempervivums (houseleeks), sedums, saxifrages, alpine pinks (Dianthus), gentians, or any of the hundreds of alpine species that need sharp drainage, alpine grit is genuinely essential. A grit-heavy potting mix (roughly 1 part grit to 2 parts peat-free compost) keeps roots healthy through wet British winters, and a grit collar around each plant prevents crown rot — the single most common killer of alpines in UK gardens. Our Alpine Grit at 2-6mm is the ideal grade for these uses: fine enough not to overwhelm delicate plants, sharp enough to deliver proper drainage.
Companions from the Bishy Range
- Peat-Free Composts and Soils — mix with alpine grit for the ideal grit-loving plant medium
- Companion Planting Seeds — many grit-tolerant cottage garden companions
- Cottage Garden Seeds — Dianthus (cottage pinks), Achillea, and many perennials that appreciate sharp drainage
- Perennial Flower Seeds — many Mediterranean and drought-tolerant perennials thrive with grit amendment
- Propagation and Growing Essentials — seed trays, pots, and everything for grit-based propagation
- Composts, Soils and Mulches — browse our full range of growing media
- The Potting Shed collection — all growing essentials in one place
About Our Bulk Materials
Alpine grit is one of a small range of bulk landscape materials we offer alongside our seed and dried flower ranges — the practical materials our own gardening team uses at Salle Moor Hall Farm and know work well. We keep the range small and considered rather than trying to stock everything. If you need advice on quantity, colour, delivery, or which grit or aggregate suits your project, get in touch — we're a small business and we'd rather help you get the right product than sell you the wrong one.
About Bishy Barnabee's Cottage Garden
We're a small Norfolk seed and garden supplies business, run from Salle Moor Hall Farm near Reepham. Our main range is the seeds we grow and harvest ourselves, alongside dried flowers from our own fields and a small curated Potting Shed range of genuinely useful materials, tools, and supplies. Alpine grit is one of the things we keep stocked because we use it constantly ourselves — it's earned its place in our range through years of use in our own garden.
Care and use
- Keep dry to prevent settling
- Cover bulk bags to protect from debris
- Handy bags can be stored stacked in dry shed/garage
- Keep bags upright to prevent tearing
HANDLING:
- 25kg bags are heavy - lift carefully
- Bulk bags require mechanical handling (crane, forklift, or
bulk bag hooks)
- Wear gloves when handling large quantities
DELIVERY:
- Standard parcel: Handy Bags (5-40 x 25kg variants)
- Pallet delivery: multiple bulk bags
- Bulk bag: single large delivery, may require crane offload
- Contact us for delivery arrangements on large orders
APPLICATION:
- Top-dressing: spread 1-2cm layer after planting
- Compost mix: blend 1 part grit to 2-3 parts compost for alpines
- Drainage: 3-5cm layer at pot/trough base
- Seed cover: thinnest layer over sown seeds
- Refresh mulch surfaces annually as needed