Who wants to spend time plucking leaves in a cold greenhouse in January? No one! But I can give you a few good reasons to winter clean plants in your backyard nursery: blackspot, powdery mildew, rust, leaf spot, aphids, whitefly, thrips, spider mites and slugs/snails. The list goes on: all those dead and standing leaves (and even the top layer of soil in your nursery pots) harbor any variety of pests and disease. If you want to give your plants the best chance to come into the spring season clean, it might mean a few gloomy days working in your greenhouse this winter.
Wish me luck!
I don't mention it in the video, but remember that the old leaves, stems and soil you remove shouldn't go into compost destined for the garden.
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https://www.facebook.com/groups/unrulyrosesociety/Photo credits:
Aphid colony by Sanjay Ach used without changes under the Creative Commons Attribution-Share Alike 3.0 Unported license
Thrips eggs and nymphs by Maximilian Paradiz used without changes under the Creative Commons Attribution 2.0 Generic license
Spider mites by CSIRO used without changes under the Creative Commons Attribution 3.0 Unported license.
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https://www.youtube.com/watch?v=tohjS_Q_qX0