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Do you have what you need to make your garden grow?

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Explore Your Local Garden Center at a Home Depot Near You. Get inspired to upgrade your plants and landscaping.

Garden Center

Contact Us
Pro Service Desk(317)913-3664
Tool & Truck Rental(317)913-3670
Store Hours
Mon-Sat: 6:00am - 10:00pm
Sun: 8:00am - 8:00pm
Curbside: 09:00am - 6:00pm
Location
9320 Corporation Dr
Indianapolis, IN 46256
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The Home Depot Garden Center at Castleton

Mother's Day Gardening Gift Sale
When you're searching for Mother's Day gardening gifts, check out the discounts on our planters, garden decor, and flower pots. Our Mother's Day Sale is your solution for the right present. You can even surprise her with new patio furniture. If you're unsure of what to get, a gift card is always appreciated. It's easy to shop the sales that run from May 2nd to May 12th on our mobile app or at your local store.

Mother and child gardening with tools

It's time to start thinking of spring. We're here to help you prepare for sprouts poking up, warmer temperatures, and fragrant breezes. Planting seeds indoors near a sunny window means you'll be ready to transplant spring flowers and young veggie plants when the frosts are through and the ground thaws. You might even want to directly sow seeds into the earth.

Plant Hardiness Zones Explained
The first thing you should know when planting veggies, spring flowers, and other seeds is your planting zone. Every location in the U.S. and its territories is sorted into blocks by climate. Find your zone on the USDA planting zone map and learn when to plant seeds.

For example, you could plant bell pepper seedlings outdoors in mid-March in Zone 10, but not until the end of May in Zone 4. The plants that'll thrive in your area are in your zone, and all the zones numbered less than that. In other words, a Zone 6 garden can support plants listed as Zones 1–6. The timeframe to direct sow outdoors in your garden is often around a month later than the indoor start date. Read your seed packet for details. If you start plants later than recommended, it's not ideal, but it should even out as time passes.

Gardening in Your Growing Zone
The Midwest is mostly Zones 6 and 7 throughout Indiana, Michigan, and Kentucky. You’ll find pockets of Zone 5 and stretches of Zone 4 in the Upper Peninsula. In Zones 5 and 6, the outdoor growing season doesn’t begin here until mid-March or even April, although you can plant some veggie seeds halfway through February. Warmer Zone 7 can start planting earlier, and Zone 4 much later on. Tomatoes, peppers, cucumbers, squash, and other classic garden crops will thrive in this region, and most of them can get an early jump on growing indoors before spring really moves in.

Also, check out certain herbs and cruciferous veggies if you're ready to get planting. This includes kale, broccoli, and cabbage. Greens like spinach, artichokes, and fragrant herbs, including parsley, basil, and oregano, also don't mind an early start. The main concern is waiting until the frost has passed for the season, so planting seeds outdoors as direct sow is later here compared to farther south.

Plant Seeds Outside With Direct Sow
Planting seeds into your garden soil, or using the direct sow method, is an alternative option. It doesn't give you as much organized planning in terms of space and reliability as starting indoors. However, if you like to go with the flow, follow the instructions on your seed packet and try it out.

Prepare to deal with whatever hand nature deals you: Be ready for none of your seeds to sprout, all of them to come up, and anything in between. Your seedlings will need to survive wind, rain, critters and bugs that crave tender greens, and cold snaps. But if you're lucky, you'll get strong sprouts that are ready to grow all spring.

Start Seeds Indoors
If you'd like more control over your seedlings' journey or you're eager to get growing, start your seeds indoors instead. In general, you can plant seeds indoors about a month before you can do it outside. Like direct sow, you push the seeds into the soil as directed on the seed packet, but that's where the similarities end.

You're responsible for giving them quality substitutes for rain and sun. Keep your seeds cozy with warming mats and grow lights, water them carefully with a spray bottle or watering can, then thin them as they germinate in groups of three. Give them a boost with a gently blowing fan as they lengthen into sprouts if you'd like. Harden them off to get them used to outdoor conditions, then transplant them into your garden when they're big enough.

Transplant Young Plants Into Their New Homes
By now, your plants have 3 or 4 real leaves — they'll look different from the miniature seedling leaves. When the ground is warm, and you're not expecting soaking rain, look into transplanting your big sprouts into their new outdoor home. These large seedlings that are ready to be planted can also be called "transplants" or sometimes "starts." In cases where you direct sowed, you may still want to shuffle plants around for the best spacing and sun. That's also a transplant situation, as is repotting plants into larger pots.

Protect Your Garden With Mulch
Finish your flower bed with compost and mulch. Mulch controls weeds and keeps the soil moist. Compost enriches the soil so your garden can grow even better. It may help foster stronger plants that bear more flowers and fruit. Compost and mulch can be DIY creations, but you can also purchase them in-store. The next time you're looking for "mulch near me," stop by the Garden Center to get the perfect amount.

Greet the Spring
Early spring is an exciting time in the world of gardening. Don't miss a minute of growing season. Plan your garden and landscaping, prepare to fertilize your lawn, and browse our garden center pages to find inspiration on what to plant when the weather warms. Shop for the seeds, fertilizer, and soil you need in the aisles of your Castleton Garden Center, online, or on our mobile app. Let's get growing together.

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Frequently Asked Questions About Gardening

What number planting zone am I in?

Check the USDA planting zone map, as planting zones have shifted slightly through the years. Planting zones with higher numbers can plant earlier in the year. Increase your odds of successful gardening by choosing plants that are meant for your zone.

Can I just put seeds in the ground?

If the ground isn't frozen solid and the soil isn't cold, consider planting your veggie, flower, or fruit seeds directly into your garden. This is called the "direct sow" method. The time to plant will be after the threat of frost is gone for the season, as sprouts and seedlings can't weather those conditions. You can also start your seeds indoors if you'd like. Consult your seed envelope for when and how to sow seeds.

Do you carry organic seeds and plants?

Yes, we've got a variety of organic options, including organic fruit seeds and veggie seeds, and organic flower and herb seeds which are subject to availability. We carry the organic soil to plant it in as well as the organic fertilizer to feed it.

Should I harden off my seedlings before planting them outside?

Yes, if you raised plants indoors from seeds, harden them before you transplant them. Hardening allows your seedlings to adjust to outdoor life and the fluctuating spring weather, making them more resilient against cold snaps. It slows their growth until they're strong and ready to take off during a spring warm front.

How do I plant a transplant or baby plant?

Squeeze the plastic around the plant to loosen the soil. Carefully coax the plug of dirt with the plant into your palm, then place it into the hole you dug for it. Make sure the top of your transplant's soil is even with the garden soil, and carefully press the earth into place. Avoid mounding a volcano of dirt around your plant, and don't tamp down the ground too tightly. Your plant baby needs to breathe.

Should I use peat moss starters or coir starters?

Seed starters, full of nutrients in pellets or pots, work for new and experienced gardeners. You don't have to use these starters if you're planting in soil, but you may want to. Starting seeds in peat pots works best for delicately rooted plants like carrots and beets, as well as flowers that require an acidic pH. Some people prefer coir starters instead, as they have a neutral pH. Check what type of soil your plants need to help narrow it down, and chat with a garden center associate if you need more info.

Nearby Stores

2225 N Post Rd

Indianapolis, IN 46219

8.74 mi

Tool & Truck Rental

(317)890-6410

Pro Service Desk

(317)890-6404

Mon-Sat: 6:00am - 10:00pm

Sun: 8:00am - 8:00pm

3300 Conner St

Noblesville, IN 46060

8.94 mi

Pro Service Desk

(317)770-5404

Mon-Sat: 6:00am - 10:00pm

Sun: 8:00am - 8:00pm

9855 North Michigan Rd

Carmel, IN 46032

10.21 mi

Pro Service Desk

(317)871-6062

Mon-Sat: 6:00am - 10:00pm

Sun: 8:00am - 8:00pm

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