When To Apply Rose Fertilizer

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By Stan V. (Stan the Roseman) Griep
American Rose Society Certified Consulting Rosarian – Rocky Mountain District

Image by T.Kiya

Roses need fertilizer, but fertilizing roses does not need to be complicated. There is a simple timetable for feeding roses. Keep reading to learn more about when to fertilize roses.

When To Fertilize Roses

I perform my first feeding around mid to late spring – the weather patterns really dictate the first feeding of roses. If there has been having a string of good warmer days and steady night temps in the upper 40’s, it is safe to start feeding the roses and watering it in well with either my choice of chemical dry mix (granular rose bush food) rose food or one of my choices of organic mix rose food. The organic rose foods tend to do better once the soils have warmed up a bit.

Approximately a week after the first spring feeding I will give each of my rosebushes some Epsom salts and some Kelp Meal.

Whatever I use to feed the rosebushes for their first feeding of the season is then alternated with another of those rose foods or fertilizers on my list for the next dry mix (granular) feeding. That next dry mix feeding is around the early summer.

Between the granular or dry mix feedings I like to give the rosebushes a little boost feeding of foliar or water soluble fertilizer. A foliar feeding is done approximately half way between the dry mix (granular) feedings.

Types of Rose Fertilizer

Here are the rose food’s fertilizers I currently use in my rotation feeding program: (Apply all of these per the Manufacturers’ Listed Directions. Always read the label first!!)

Granular/Dry Mix Rose Fertilizers

Vigoro Rose Food — Chemical Mix

Mile Hi Rose Food — Organic Mix (Made locally and sold by local Rose Societies)

Nature’s Touch Rose & Flower Food — Organic and Chemical blend

Foliar/Water Soluble Rose Fertilizer

Peter’s Multi Purpose Fertilizer

Miracle Gro Multi Purpose Fertilizer

Other Nutrient Containing Rose Feeding Items Added

Alfalfa Meal — 1 cup Alfalfa Meal – Twice per growing season for all rosebushes except miniature rosebushes, 1/3 cup per Mini-rose bush. Mix into soils well and water in well to help keep it from attracting rabbits that will then nibble on your roses! (Alfalfa tea is very good as well but also very smelly to make!).

Kelp Meal — Same amounts as listed above for the alfalfa meal. I only give the roses this once per growing season. Usually at the July feeding.

Epsom Salts — 1 cup for all rosebushes except miniature roses, ½ cup for Mini-roses. (Given once per growing season, usually at the time of first feeding.) {NOTE: If high soils salts problems plague your rose beds, cut the amounts given in half at least. Recommend using it every other year instead of every year.}

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