Red and green shiso basil seeds are also known as Japanese basil seeds – and produce a uniquely flavoured herb that some say tastes as much of mint as basil. Shiso has a herby, slightly citrus taste and is used in many Japanese recipes from sushi to garnishing ramen. Or try using shiso to replace mint in cocktails such as mojitos or juleps. Packet includes 150 seeds. Plants grow to 40cm tall and 30cm wide. How to grow red and green shiso basil Sow indoors Feb-Mar and outdoors April-Jun. Germinating time 7-15 days. Harvest in 40-60 days. Keep in full sun to partial shade. Water regularly, but not too much.