Crush my own lava rock for substrate? 5kilo bags $7 from,
Crush my own lava rock for substrate? 5kilo bags $7 from home depot. or $63 for a 5kilo bag of eco complete. 22 comments. share. save hide report. 100% Upvoted. This thread is archived. New comments cannot be posted and votes cannot be cast. Sort by. best. level 1.Can i use fine crushed lava rock as substrate ? - The,,03-06-2019· When it is crushed as fine as shown in your picture, lava rock makes a pretty decent substrate. However: ~The base material is still lava. It has been baked (by the earth) to the point that any minerals it has are unavailable to plants.Amazon: crushed lava rock,Lava Rock, Soil Aggregate for Bonsai, Cactus, Succulents, and Other Container Grown Plants, enables Optimal Drainage, Improves Soil Aeration 1/4 inch Black Lava Rock (2 Quarts Bag) 4.7 out of 5 stars 206. $14.85 $ 14. 85. Save 10% more with Subscribe & Save. Get it as soon as Thu, Dec 10.