You can also make some extra nectar at home and reserved it for some days but don’t use a too old nectar. It may cause harmful effects on birds. Whenever you made nectar at home, it’s really depending upon the weather how long it will be fresh. But in any condition make sure you don’t feed the birds with one week older nectar. You can reserve your nectar in refrigerator for 4 to 5 days. Moreover it’s depending upon the humidity of the environment where the nectar is reserved.
Nectar in the feeder
Now how long you can feed the birds with same feeder nectar. Although it’s really depend upon the weather and your feeder location but you don’t need to late maximum 2 or 3 days. If the weather is cool you can use the same nectar feeder for 2 to 3 days but of the weather is hot you should change the nectar after 1 day. You can also place your feeder in shade so that the nectar is remaining in good quality and the birds can feed it with comfort in shade.