Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Bumble bee is thought of as half hardy, so it will need cloching or fleece protection when the temperature dips. Bumble bee requires a potting mix and loamy soil with a ph of 5.5 - 7.0 - it grows best in weakly acidic soil to neutral soil.
Growing Bumble bee from seed
By our calculations, you should look at sowing Bumble bee about 77 days before your last frost date.
Transplanting Bumble bee
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Bumble bee is a half hardy plant.