Royal mail's maximum delivery weight is 30kg - this means we can only send a maximum of 2 large bags in one order. Recycled crushed, washed and dried whelk shells. This is ideal for the indoor plant pot and terrarium top dressing. Great for cacti, succulents and most houseplants. Alternatively, you can mix the shells into soil or compost to increase drainage. This bag contains a finer crush of shells than our other bags, ideal for top dressing miniature plants and pots (contains approximately 1 kg of shells). Our potting cup is the perfect tool for scooping and decanting shells and other substrates. The super crush bag has the same dimensions as our mini bag. This is a natural product from the sea. We do our best to remove any foreign material. Paper bag and tie handles- 100% recyclable.