No it won’t go bad, unless you didn’t clean your equipment properly, used a cheap kit, and/or have poor storage. Quality kits will improve with 4 or more months aging and develop more complex flavours when given the time. Our standard corks are 3-4 year corks, so as long as you have good storage you can keep kit wines more than 2 years if you like.
After bottling your wine, if you used cork, you should let the bottles stand upright for 2-7 days then lay them on their side or turn them upside down so the wine and not the air bubble is on the cork . This will prevent the cork from drying out and sticking to the bottle as well as reducing the rate of oxidation. If you have used our new synthetic corks you should let the bottles stand upright for 4-7 days before you turn them on there side. But because they are plastic they will not dry out, so you can store your wine standing upright if you wish. With synthetic corks you will never get “cork taint” in your wine or cork crumbs. They are easier to put in and pull out, and they are #4 recyclable plastic.
The first thing to worry about is maintaining a constant temperature day and night, summer and winter. It is best if you have less than 4°C fluctuation year round. Once you have a constant temperature then you can work on getting it down to between 12-18°C . The longer you plan on ageing your wine the more important temperature becomes, but constant room temperature works fine for those with a fast turnover rate.
You can drink it any time after it is ready for bottling. BUT, as a general rule even the cheapest of kits is better after 4 months ageing. Most premium whites start to develop their full complex flavours in the 4-6 month range and reds in the 6-8 month range. The kits with the crushed grapes seem to develop in the 8-12 month range but may peak closer to two years (depending on storage).
The bottom line is personal taste. When do you like it best? The best way to find out is every time you do a different type of kit take one case of 12 bottles and set it apart from the rest. This will be your test case, the rest you can drink as fast or slow as you like but the test case gets reserved for the “first Friday” of every month. Every time you try a test wine make notes how you liked it because you will forget otherwise. After one year you will know if you liked it best after 1-3-6-8 or 12 months and next time you make that type of wine you will know not to touch it for the first 6 months or how ever old you liked it best. After a few batches you will get to know when you like wines in general and can plan your wine cellar size to match your tastes and consumption. e.g.-You like the wine best after one year. Average one bottle with dinner every night (including what you give away and your friends drink when over) = 365 bottles minimum needed in the cellar.