Snapdragon Flower Spacing. This allows plants plenty of time to develop to bring on blooms much earlier in the growing season. These blooms love the cold weather and can handle a light frost so their seeds are usually planted in the late fall or even on top of the snow.
Height to 18in 45cm. Sun to Part Shade. 4 x 4 in for a once-over harvest of single stems or at 9 x 9 in.
A partial shade position helps to keep the plants cool and in flower during the warm summer months.
Once they get about six inches tall we add a layer of tenax netting to keep heavy stems from toppling over in the spring rains. Plant spacing in the tunnel can either be high density eg. Floral Carpet dwarf series. Snapdragons are at their best if temperatures are in the low 70 s in the day and low 40s at night.