Answer: I know that plants such as chile peppers and herbs taste stronger when they grow in hot, dry conditions. I have noticed the same problem with basil towards the end of a season, when it's old and tough. Another problem may be soil fertility. Basil prefers a rich, well-drained soil, and should be mulched after soil warms up to discourage weeds and equalize soil moisture/temperature. Soil pH also affects plant growth and flavor, so check to see if your soil pH is off - basil likes it where most garden plants do - 6.0-6.5. Hope this makes the difference! The only other possibility I know of is that your tastebuds are very sensitve, and prefer the mellower taste of a less-vigorous "winter-window" basil. Hope this sheds some light!
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