By choosing even just a few varieties, your garden can host flowering Lavenders from late-May to the first frosts. July, though, really is Lavender month as all of the most popular varieties are in bloom…
Lavender Imperial Gem Mid-May to mid-July
Lavender Dwarf Blue Mid-June to July
Lavender Hidcote Mid-June to July
Lavender Twickle Purple June to July
Lavender Richard Gray Mid-June to August
Lavender Alba Mid-June to September
Lavender Grosso July to September
Lavender Maillette June to end July
Lavender Sawyers July to mid-August
Even better, is that many Lavenders, like Roses, can be encouraged to a second flush by what amounts to dead-heading. As flowers go past their best, simply cut back the old flowers. Imperial Gem, among others, responds particularly well.