Sow during March and April or in September, depending on soil conditions. On lighter soils, autumn-sown seeds generally germinate and establish quickly, although some will not come up until the following spring. This delay makes it advisable to wait until March or April on heavy soils, as waterlogging may cause the seed and seedlings to rot during winter.
Please note that garden ‘wildflower’ seed mixes and/or plants (which may contain non-natives or be of unknown provenance) should not be sown in the wider countryside or close to environmentally sensitive areas. They should also never be sown without a landowner's permission.