There was considerable interest in my post last week, where I shared a photo from Canadian garden writer David Hobson. I wasn’t impressed with the production method and materials for the petunia that was illustrated, but readers wanted to know a little more about the plant (how did the top of it look?) and the mesh encasing the root ball. So I contacted David, and he graciously shared some more information and photos with me.
Here are David’s comments:
“Attached are three photos. Not the best, but the one beside the broom is the original that I sent you. It’s been lying on the patio and has lost a few stems. I don’t have a shot of it in flower as I didn’t particularly like it — one of those new wine and yellow striped things. It was in a container with a couple of other plants and did flower somewhat, but not noticeably well.
“Next shot appears to be a coleus — slightly more roots, but hardly a star.
“Sadly, I can’t tell what number three is for sure as I retrieved it from the compost heap, but it has had an awful time trying to burst free with its tuberous roots.
“I do plant as many as 100 containers in all shapes and sizes each spring and all are all well tended, planted in my own compost mix, supplemented with water soluble fertilizer, watered as required, and suitably oriented.”Certainly, how well these plants thrive and produce blooms is an issue, but given the restrictive nature of this material, it does not appear to be at all biodegradable, a quality that one would think essential. After almost six months in soil, it has barely changed its structure.
“As an after note, I removed the fabric from the petunia and dried it. It is a very fine mesh. I then subjected it to a heat source whereupon and it shriveled and melted as one would expect a plastic material to perform — draw your own conclusions.”
The first photo is the petunia from last week’s post. I think it’s fair to say that the root system is significantly impaired and would require frequent watering to support the above-ground portion (which is pretty wimpy looking). The other photos show the same problems. And it’s apparent from David’s description that the plug wrap is probably made of a plastic of some sort.So, yes, I think it’s the production method – specifically the plastic mesh – that’s creating these poor quality root systems. Gardeners will have better luck with seedling liners filled with loose media.