Can not planting perennials in ground deep enough cause them not to sprout correctly or premature in some way?

My sister planted some flowers in my flowerbed, which she said were perennials. They recently sprouted out of ground about an inch or so, and are red in body and cone shaped. Is this a sign of not being planted deep enough, or premature sprouting of some sort? And if so, would covering with more dirt help even though they've already sprouted? Any insight on this matter would be greatly appreciated.

Can not planting perennials in ground deep enough cause them not to sprout correctly or premature in some way?
Most plants will say to plant at the same depth as they were started at. bulbs and other plants like bulbs will be planted at different depths, usually the bigger the bulb the deeper you plant then (tulips can be 5 inches or better) and something like peony's and only planted about 1 1/2 to 2 inches deep.
Reply:It depends on what kind of flowers they are. Some are planted deep in the soil and others shallow. Wait and see what they do this year. Two inches isn't enough growth to see yet. If they don't do any good, find out what they are and look up how to plant them. There are numerous books out on perennials and you can also check with your local university extension center.
Reply:Most flowers start off small and as the summer progresses will grow bigger and taller. Give them time. Some plants will not bloom until June or July.



Buy liquid fertilizer and fertilize about every 14 days. BE SURE TO READ THE INSTRUCTIONS ON THE CONTAINER, or you might burn your plants. We like Miracle-Gro Bloom Booster, but there are many other good brands.