They don't like daffodils so you can plant oodles of daffodils.

Have a look online at 'Grazers', it is a spray which deters several pests including deer.

Hi, welcome to GoY, if you can keep the deer off the following until they get established, they won't eat ; Agapanthus, Aquilegia, Buddleja davidii, Cistus, Clematis, Daphne, Delphinium, Digitalis, Echinops, Euphorbia, Forsythia, Gaultheria, Heleborus, Hydrangea, Jasminum [winter and summer types], Kerria japonica, Kniphofia, Lavandula, Leucanthemum x superbum, Lonicera species, Lupinus, Monarda didynia narcissus, [as previously mentioned], Nepeta x fassennii, Nerine, Philadelphus, potentilla fruiticosa, Ribes, Romneya coulteri, Rosa rugosa, R spinosissima, Spirea japonica, Vinca major, V minor, Weigela. Yucca, Derek.