Sowing Wildflower Perennial Mixes
Sow in the Spring or Autumn at around 1g per m2. Good ground preparation is essential. Wildflowers will not survive or compete in areas of lush weed growth such as thistle, bindweed and nettle. It may be that you need to spend a season clearing the ground of all weeds before attempting to sow. Don’t sow perennial wildflowers into problem areas, it won’t work.
When you have cleared your area of all weeds, rake over to level the soil and ensure a crumbly surface for the seeds to fall in to. Broadcast the seed at the recommended rate and in the early stages, keep well watered. The seeds should start to germinate in about 28 days. Some species may need a frost to help to germinate, so be patient, the seeds lie dormant in the soil until the conditions are right for germination to occur.
Unless sowing with a companion annual mix, do not expect to see flowers in the first year - perennials need to grow for at least 2 years before the plants are mature enough to flower. Year 1 maintenance - just keep an eye on it and spot treat or remove any obnoxious weeds that find their way into the area.
Year 2 and onwards maintenance - Allow the seeds to ripen and fall into the soil usually towards the end of August.
Cut back hard. It is only important to remove the cuttings if they block light reaching the seeds that have just fallen, if there is not a lot of growth, ensure the cuttings are chopped fine - two passes of the mower.