Growing nemesia is very easy. It blooms quickly after planting and display colorful beautiful flowers.
It is more often seen in warm climate zones as an perennial flower, but in cool climate zone it is annual.
Blue flowers appear all summer long till September.
This variety is the highest of all the cultivated species, reaches height of about 35-50 cm. It has slightly larger and beautiful flowers and blooms very profusely.
Planting nemesia in sunny spot promotes more bloom, plant it on the position where it’ll receive at least 6-7 hours of sun. If you’re growing it in subtropical and tropical zone, save it from the afternoon sun.
Soil should be moist and slightly acidic. Even a momentary lack of moisture can affect the inhibition of flowering.
However, it is very sensitive to water logging so while planting, prepare soil with high proportion of fine gravel or vermiculite for good drainage.
Information source: http://balconygardenweb.com/how-to-grow-nemesia/
Genus - Nemesia
Species - Versicolor
Variety - Blue Gem
Common name - Nemesia
Pre-Treatment - Not-required
Plant type - Annual, Perennial flower
Hardiness zones - 4 - 9
Exposure - Full Sun, Partial Sun
Height - 0.25 (0.50) m
Spread - 0.10 m
Growth rate - Fast
Bloom season - June - September
Leaf / Flower color - Green / Blue
Soil PH - Acid, neutral
Soil type - Average to humus rich garden soil
Water requirements - Average
Landscape uses - Balcony, terrace, patio gardens, hanging baskets, small pots, decorative bowls, urns
Sow nemesia seeds in late spring or summer or when all the dangers of frost pass away and temperature starts to range near +15-22C, this is the optimum germination temperature of nemesia seeds.
In sub tropical and tropical climate, best planting time is fall and winter, when temperature stables around the optimum range written above.
Seeds will germinate in 5-10 days after sowing.
Transplant them when 3 real leaves of plant will appear, leaving 12-15 cm. (4-6”) space for every plant in flower as it looks beautiful in flower beds and creates a riot of color.
It is also suitable for balcony, terrace and patio gardens as growing nemesia is possible in hanging baskets, small pots and decorative bowls and urns because of its small height.