What is Palagonite Basalt Rock Dust, exactly?
A naturally occurring, Australian-mined basalt rock dust formed from weathered volcanic ash (palagonite tuff). It’s loaded with slow-release minerals, boosts cation-exchange capacity (CEC), improves water-holding, and feeds beneficial soil life.
Why would I add Basalt Rock Dust to my soil if I already fertilise?
Fertilisers feed plants; rock dust remineralises the soil so plants can access a broader spectrum of trace elements for longer. Think of it as topping up the pantry, not just serving tonight’s meal.
What minerals are in Basalt Rock Dust?
It’s naturally rich in silicon (~22%), calcium (~5%), magnesium (~3.3%), potassium (~0.77%), phosphorus (~0.24%), plus iron, manganese and a suite of trace elements (copper, zinc, cobalt, nickel, molybdenum, boron, selenium) in plant-useful amounts.
What’s the pH, CEC and paramagnetism of Basalt Rock Dust?
pH 8–8.5, CEC ~35 meq/100g, and a paramagnetic reading of ~600–1300 cgs. Translation: it lightly buffers acidity, holds nutrients well, and has strong “volcanic vitality” that growers chase in premium rock dusts.
How much should I use in the garden?
Use 50–150 g per m² as a general top-up. For tired soils, go to the higher end once, then maintain at the lower end each season.
How often should I re-apply?
2–3 times per year is plenty for most gardens: at bed prep, mid-season, and after harvest. Dust works slowly and keeps giving for years; don’t expect instant “fertiliser-like” spikes.
Can I mix Basalt Rock Dust into potting mixes or raised beds?
Yes. Blend at ~0.5–1% by volume (about 5–10 g per litre of mix). For existing containers, scratch 1–2 teaspoons into the top 15–20 cm of a 20–30 cm pot and water in.
Is Basalt Rock Dust good for lawns?
Yep. Broadcast 50–100 g per m² in spring and again in autumn, then water in. It pairs nicely with your usual lawn feed.
Can I add Basalt Rock Dust to compost or worm farms?
Absolutely. Add a light sprinkle (a small handful per 20–30 L of material) when building compost, or a teaspoon every few weeks to a home worm farm. It buffers acids and adds minerals.
Will Basalt Rock Dust change my soil pH?
It’s mildly alkaline, so it nudges acidic soils upward a touch (often helpful) and has little effect on already alkaline soils at the recommended rates. If your soil is very alkaline, stay at the low end of the dose.
How quickly will I see results?
You’ll often notice better vigour and colour within a few weeks, but the real win is cumulative—improved structure, water retention, and nutrient density over months and seasons.
Is Basalt Rock Dust safe for edible gardens?
Yes—this is a naturally sourced soil amendment intended for food gardens, orchards and veggie beds. As with any fine powder, avoid inhaling dust during application.
Does Basalt Rock Dust contain heavy metals?
All rocks contain trace amounts of metals, but palagonite basalt is chosen for garden use and applied at very low rates. Use as directed and avoid over-application. If your crop is ultra-sensitive or certified organic, follow your scheme’s guidelines and consider soil testing.
What’s “paramagnetic rock dust” and why should I care?
It’s a measure of how the material responds to the earth’s magnetic field. Higher readings are sought after by organic growers who report better soil structure and plant resilience. This product sits in the high range.
How is palagonite different from generic “rock dust” or granite dust?
Palagonite is basalt-derived and typically offers a broader mineral spectrum with useful iron, magnesium and silicon. Granite dust is heavier on silica and slower to weather. Many growers prefer basalt for balanced remineralisation.
How does Basalt Rock Dust compare to Azomite or “volcanic minerals” from overseas?
Different geology, different mineral profile. Palagonite is local basaltic material; Azomite is a specific deposit from the U.S. Use either for trace minerals—but if you want Australian-mined basalt with strong paramagnetic and CEC numbers, this is it.
Can I use Basalt Rock Dust in hydroponics?
No. Rock dust is insoluble and designed for soil/soilless mixes, compost and lawns—not hydro systems where minerals must be fully soluble.
Will Basalt Rock Dust help with nutrient lockout?
Indirectly, yes. By improving CEC and microbe activity, soils buffer better and make nutrients more available. If you’ve got acute lockout, fix pH and watering first; use dust as the long-term stabiliser.
Does Basalt Rock Dust replace lime or gypsum?
No. It’s not a substitute when you specifically need calcium carbonate (lime) to lift pH a lot, or gypsum to add Ca/S without shifting pH. Palagonite adds balanced minerals with a slight alkaline nudge.
Is Basalt Rock Dust okay for natives and acid lovers (azaleas, blueberries)?
Use sparingly (25–50 g per m²) and monitor. Many Australian natives dislike big pH jumps and excess phosphorus; this product is low in phosphorus but still go light.
Can I put Basalt Rock Dust around fruit trees?
Perfect. Sprinkle 2–4 handfuls evenly across the dripline for established trees, 1–2 handfuls for young ones, then mulch and water.
Is Basalt Rock Dust dusty? Any handling tips?
It’s a fine powder. Apply on a still day, wear a dust mask, and lightly water in or mix with compost/mulch to keep it put.
Will Basalt Rock Dust make my soil hold more water?
Yes. It encourages aggregation and has a high measured water-holding capacity itself, so beds tend to stay moister between irrigations.
Can I brew Basalt Rock Dust in compost tea?
You can add a teaspoon per 10 L as a mineral buffer, but most benefits come from adding dust to soil or compost rather than trying to “extract” it into a tea.
Does Basalt Rock Dust help with pests or disease?
Healthier, remineralised plants are generally tougher. While it’s not a pesticide, growers often report fewer issues once soils are balanced and microbially active.
Can I overdo Basalt Rock Dust?
You could. More isn’t better—excess can nudge pH too high and waste money. Stick to 50–150 g per m² (or 0.5–1% in mixes) and re-apply modestly through the year.
How long does Basalt Rock Dust last in soil?
Years. Finer particles feed sooner; coarser fractions weather slowly for a long, steady mineral trickle.
What particle size is Basalt Rock Dust—powder or grit?
Primarily a fine powder suitable for top-dressing or blending. If you need coarser grit for aeration, pair it with pumice, scoria or diatomite.
Will Basalt Rock Dust improve flavour and nutrient density of produce?
That’s the goal of remineralisation—balanced trace minerals often correlate with better flavour, aroma and storage life. Results vary with overall soil health and organic matter.
Is Basalt Rock Dust pet- and kid-safe?
Yes, when used as directed. Keep the bag out of reach, don’t let anyone inhale dust, and water it in after spreading.
What sizes do you sell and how far do they go?
1 kg and 2.5 kg bags. As a rough guide, 1 kg covers ~7–20 m² at typical rates. Use higher rates for tired beds, lower for maintenance.
How do I store Basalt Rock Dust?
Cool, dry spot, bag sealed. If it clumps from humidity, just crush the lumps—it doesn’t affect performance.
Will Basalt Rock Dust stain pavers or concrete?
It can leave a dusty residue. Brush or blow off hard surfaces before watering in.
Can I combine Basalt Rock Dust with other Dr Greenthumbs amendments?
Yep. It plays nicely with compost, TurboDirt, worm castings, frass, kelp, fish hydrolysate and humates. If you’re using high-phosphorus inputs, keep this as the low-P mineral backbone.
Any signs I actually need rock dust?
Common flags: soils that slump/compact, pale or bland-tasting produce, chronic micronutrient niggles, or mixes repeatedly recycled without mineral top-ups.
I’m growing cannabis—how would I use Basalt Rock Dust?
Mix 5–10 g per litre into your base mix at transplant. For established plants, scratch 1–2 teaspoons into the top layer per 20–30 cm pot every 3–4 weeks through veg and early flower, then stop and just water/mulch.
Will Basalt Rock Dust void organic practices?
It’s a mined mineral input widely used in organic systems. If you’re following a certification, check your scheme’s input rules, but home and market gardeners use it routinely.
Final tip to get the most from Basalt Rock Dust?
Pair palagonite with organic matter (compost or TurboDirt) and a living mulch. Minerals + biology + carbon is the winning combo. Spread light and often, water in, and let the soil do the heavy lifting.
