Lawn feed used in Spring usually contains a high proportion of nitrogen to encourage leafy growth. If used in borders, some perennials will put on too much leafy growth, compromising flowering and becoming more attractive for slugs. Ornamental grasses won't like too much nitrogen, they'll become floppy and less wind resistant. There are also some plants that prefer impoverished soil like Lavender and Lupins.
@monkeyrakshaNEVER use lawn feed on garden plants. As @Plantminded said it contains too much nitrogen for your plants. You need to use feed that is designed for plants and leave the lawn feed for your lawn.
Thanks for the advice I was just checking it out as been advised you can use it on plants but nothing mentioned on any packet and always thought that Lawn feed was for lawns. Thanks most appreciated
Posts
Some lawn fertillisers have weed-killer an/or moss-killer in their formula. I wouldn't use one of those. Otherwise they list their NPK (mostly N).
"Have nothing in your garden that you don't know to be useful, or believe to be beautiful."
Some peoplw must have a shed filled with many repeats of the same thing. I know my now deceased neighbour had one for every plant.
"Have nothing in your garden that you don't know to be useful, or believe to be beautiful."