One plant looking like maize came up in backyard with start of rain in May and it grew well. Later when it flowered and grain formed in December, one whatsapp group identified it as 'Jowar' or Sorghum. Not sure, how it came up there, may be I had a number of millet seeds from Organic World Congress and it would have been one of it.
It grew very tall, may be around 8-9 feet and with many tillers and many bunches of flowers were seen and grains also are in plenty. It looks to be a good crop for natural farming, not sure how to process it or cook it, anyway will be trying it in one patch in next year.