Planter Bags

pb-95Used to cultivate and grow seedlings into plants or various different fruit and vegetables, depending on the type of seed used. All bags produced by Poly Logic Plastics, unless requested otherwise, are punched with drainage holes (which can be and often are determined by the client and the particular needs they have). This is done at no additional charge. For a current price list on stock items, or a quote on a customised product please contact us.


    • Plastic Planting Bags are a low cost replacement for rigid containers.
    • Plastic Planting Bags are available in standard and custom sizes.
    • More plants can be stored per square foot using Plastic Planting Bags.
    • Water is conserved because moisture in the soil is retained longer when using Plastic Planting Bags.

Around 40 years ago nurserymen discovered that there are many reasons to replace rigid plastic and metal containers with Plastic Planting Bags. Economies are affected not only by lower initial cost but bags also require approximately 40 times less storage space than their rigid counterparts. The most significant advantage becomes evident through a study done on the differences between plants grown in Plastic Planting Bags compared with plants grown in rigid containers, all other things being equal (i.e. both received identical water, fertiliser and all other cultural practices). The outcomes are summed up nicely in the words of Doctor Carl E. Whitcomb which appeared in an article published in the June 1979 issue of American Nurserymen:

“At the end of the growing season, plants in soft containers were five to 15 percent larger than plants in the same size rigid plastic containers. This was surprising, because the rigid containers were green and the soft containers were black and, therefore, had slightly higher soil temperatures.

However, the reason for the growth increase was highly visible when the containers were removed. Plants grown in soft containers had a more fibrous root system than plants in rigid containers. Counts of white root tips visible on the surface of the root ball were more than six times greater on plants grown in soft containers.

Useful Tip: Don’t forget that as you fill a bag the volume expansion will slightly decrease the height measurement of the bag!


How do we measure the volume of soil that goes into a planter bag? In the old day planter bags were sized to pint volume and titled by that number. Nowadays we measure volume in litres. See the below table for the conversion rate.

Are the bags UV treated? The materials used in the production of the black planter bags include a black master batch product, giving a natural UV resistance. There is no actual UV additive applied to the process for black bags. We describe the planter bags as UV resistant, and can guarantee a minimum of 2 years of life (subject to exposure to sunlight, chemicals and sprays – these can shorten the life and durability of the plastic).