Pumice, also known as pumice stone, is a volcanic mineral substrate that\u2019s extremely light and porous, widely used in professional substrate mixes for bonsai and special plants. Formed during volcanic eruptions by the expansion of gases in magma, it has a unique structure that combines excellent drainage, high root oxygenation, and good water retention.
Thanks to its high porosity, pumice stores water inside its micropores and releases it gradually to the roots, while keeping excellent aeration of the root system. This makes it especially valuable in mixes designed to promote vigorous, healthy growth.
Compared to volcanic gravel, it offers higher moisture retention and significantly lower weight, allowing lighter, more balanced substrates.<\/p>\n
Features<\/strong> Benefits<\/strong> Use<\/strong> It\u2019s especially valued for:<\/strong> Why choose pumice?<\/strong> Composition<\/strong>: Natural volcanic pumice stone.<\/p>\n","protected":false},"excerpt":{"rendered":" Pumice, also known as pumice stone, is a volcanic mineral substrate that\u2019s extremely light and porous, widely used in professional substrate mixes for bonsai and special plants. Formed during volcanic eruptions by the expansion of gases in magma, it has a unique structure that combines excellent drainage, high root oxygenation, and good water retention.Thanks to […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false,"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":""},"product_brand":[],"product_cat":[1445,752,1451,753],"product_tag":[],"class_list":["post-94360","product","type-product","status-publish","product_cat-7-accessories-plant-care","product_cat-bonsais-en","product_cat-potting-mixes","product_cat-substrates-and-fertilisers","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/hortodocampogrande.pt\/en\/wp-json\/wp\/v2\/product\/94360","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hortodocampogrande.pt\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hortodocampogrande.pt\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/hortodocampogrande.pt\/en\/wp-json\/wp\/v2\/media?parent=94360"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hortodocampogrande.pt\/en\/wp-json\/wp\/v2\/product_brand?post=94360"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hortodocampogrande.pt\/en\/wp-json\/wp\/v2\/product_cat?post=94360"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hortodocampogrande.pt\/en\/wp-json\/wp\/v2\/product_tag?post=94360"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Natural volcanic rock with high porosity
Neutral to slightly alkaline pH (approx. 7\u20138)
Excellent drainage and root aeration
Good water retention capacity
Very light and stable
Free of free lime
Doesn\u2019t break down easily over time
Free from residues, pests, fungi, and weed seeds<\/p>\n
Promotes the development of healthy roots
Reduces the risk of waterlogging and root rot
Allows more frequent watering without compromising drainage
Contributes to more vigorous growth
Helps recovery and rooting after repotting
Keeps the substrate structure for several years
Recommended for
Deciduous bonsai
Evergreen bonsai
Conifers
Pre-bonsai in the growth phase
Yamadori in recovery and rooting
Mediterranean plants
Succulents and cacti
Specialty plants<\/p>\n
Pumice can be used on its own at certain growing stages, but it\u2019s usually incorporated into substrate mixes together with Akadama, volcanic gravel, Kanuma, or organic components such as coco peat.<\/p>\n
Fast-growing pre-bonsai;
Yamadori after collection, to encourage root production;
Mixes for species that benefit from high drainage;
Drainage layers at the bottom of pots.
Because it has a low nutrient-holding capacity, it\u2019s recommended to use it together with organic components or substrates that complement this characteristic.<\/p>\n
Pumice is one of the most widely used components by professional bonsai growers thanks to its ability to balance drainage, moisture retention, and root oxygenation. Its lightness, stability, and versatility make it an excellent choice if you want to create high-performance substrates and promote strong, healthy root development.<\/p>\n