Good question as I was thinking something similar come May when temps dips....I was thinking of just planting cloves I pull from the store bought bulbs but would also like to hear what the experienced garlic growers on this forum do.
Flamin'....have a look see at gardenate
Most bulbs will sprout but if it's not the right variety it may fail eventually.
Italian pink and glenlarge are suited to the tropics.
All imported fruit and veg have been irradiated so will not grow.
March April are the best time to sew in the tropics once worst of the rain is past.
If you want veg to grow off the shelf buy from the organic supermarket, such as seeds, veg cuttings, herbs, etc. I've bought sesame seed, chia seed, garlic, sweet potatoes, shallots, pumpkin, tomatoes, pawpaw, unhulled sunflower seed, ginger, herbs, etc for my garden.