Rail and ferry services have been disrupted for weeks by migrant activity and French strikes. Currently, when required, lorries bound for Dover are "stacked" on a closed section of the M20 while other traffic is diverted onto surrounding roads.
European Federation of Interior Landscape Groups chairman and Indoor Garden Design creative director Ian Drummond said: "We have had a few deliveries delayed in getting to us from Holland and one delivery a few days late where some of the more tender plants were affected by being in transit so long."
Haskins buying director Conna Powles said: "Houseplants from Holland is an issue. We're working with the supplier to bring them in in a different way." Garden Centre Association discussion groups have helped, she added.
Alton Garden Centre director Andy Bunker said: "We've had no problems, perhaps because our plants come in from Harwich or Felixstowe. But someone like Haskins, being on the south coast, may have more of an issue. The Dutch are well-organised and they will have contingency plans for different routes."
RHS Plant Centres deputy buyer John Winterson said: "All ours come in at different ports so we've had no problems at all."