The Altum's Story | Zionsville, IN | Altum’s Horticultural Center and Landscape

Spring Gardening Checklist

Checkbox-imagePLANT COLOR

An ideal time to plant colorful, summer-blooming shrubs like spirea, hydrangea and easy-care shrub roses. We also swear by Fertilome Root Stimulator and Elements, on organic Fertilizer.


With a pot trellis, containers turn colorful vining plants like mandevilla, moonflower, black-eyed susan vine or morning glories into vertical art.


Schedule a Snapshot Gardening Consultation at the garden center to get you going in the right direction. Find out more. Perfect for DIYers and created for small spaces.


Pinch off dying/dead flowers to make room for new ones and help things along with Jack’s Petunia Feed.

Checkbox-imagePRUNE LIKE A PRO

The perfect time to prune early spring flowering trees and shrubs like lilacs (once their flowers have faded or fallen). Find the imaginary center of the shrub or tree, then visualize the general shape that builds around it. You don’t have to be perfect, just trim any wayward branches right above one or more healthy leaf buds.

Let’s grow together. Stop in, call 317.733.GROW and find what you need online.

The Altum’s Story

Bob Altum of Indianapolis Garden Center AltumsFrom the first tree in 1958 to the spectacular, fanciful, and charming landscapes that followed, Bob Altum worked with purpose and passion, building beautiful gardens and lasting relationships with his clients.

For 50 years, he and his team have started every job with the most robust, vibrant plants from handpicked local suppliers who know the soil and stake their reputation on quality. Bob appreciated the “local mentality” because he practiced it himself, investing his time, attention, and resources in giving the best to his clients. This is how he earned the trust and business of generations, who learned, one after the other, that Bobʼs creativity, personal touch, and painstaking perfection were what made—and continue to make—the Altumʼs name.

Today, the Altum family practices Bobʼs garden principles from its expansive horticultural headquarters nestled between Zionsville, Carmel, and Indianapolis, Indiana. This is where we bring ideas to life. Because we share Bobʼs belief that there will always be two things worth building: gardens and relationships.