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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

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Pro Service Desk(808)582-9114
Tool & Truck Rental(808)582-9116
Store Hours
Mon-Sat: 5:00am - 9:00pm
Sun: 6:00am - 8:00pm
Curbside: 09:00am - 6:00pm
Location
1151 Mapunapuna Street
Honolulu, HI 96819
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Frequently Asked Questions About Gardening

How do I check my planting zone?

Check the USDA plant hardiness zone map, as planting zones have changed slightly over the years. 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 plant seeds directly in the ground?

If the soil is warm and pliable, consider planting your fruit, flower, or vegetable seeds directly into your garden. This is called the "direct sow" method. Plant after the threat of frost is gone for the season, as seedlings and sprouts can't weather those conditions. You can also start your seeds indoors if you'd like. Consult your seed envelope for how and when to sow seeds.

How do I plant veggie seeds?

Follow the instructions on your seed packet. It'll tell you when to start them indoors and when to direct sow. Generally, you'll add 3 to 5 seeds per planting hole, then push them down with your finger. Mark where you planted them with a flag, twig, or toothpick so you don't mistake them for weeds later.

Do I have to harden off my seedlings before planting them outside?

Yes, if you raised plants indoors from seeds, harden them first before you transplant them. Hardening allows your seedlings to adjust to outdoor life, spring rains, and temperature swings, 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. Gently coax your transplant and the surrounding clod of dirt out into the palm of your hand, 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 leaving the plant as island in a puddle of water, 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 convenient pellets or pots, work for new and experienced gardeners alike. 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 cucumbers and eggplant, 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.

The Home Depot Garden Center at Mapunapuna

On those beautiful days, clean up the yard before everything blooms in earnest. Many people feel inspired to refresh their outdoor space for entertaining, as well. Planning your garden lets you make the most of your time and space. You can also add beauty and interest with hardscaping, stonework, and water features. No matter what outdoor projects you choose to tackle, The Home Depot Mapunapuna Garden Center can help you enjoy your spring activities to the fullest.

Plant Hardiness Zones Explained
The first thing to know when planting vegetables, 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 plant hardiness 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. For best results, choose plants in your zone number or less. In other words, a Zone 5 garden can support plants listed as Zones 1–5. 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 seeds a little later than recommended, it's not ideal, but it will even out as time passes.

Gardening in Your Growing Zone
Hawaii's growing zones range from 9 to 12, with a few areas of Zone 13. Your climate is excellent for growing year-round if you've got good soil. Why not think of springtime planting now? With such beautiful weather, you can direct sow many types of seeds. Your garden might still be growing if there's no reason to put it to bed. In that case, tend it as usual.

Some seeds, like tomatoes, do best when started indoors and aren't recommended as direct sows, so read your seed packets and adjust accordingly for your region. Plantains, coconuts, and bananas thrive in Hawaii's tropical climate. Roots like yams, taro, and tapioca grow well, too.

Hot peppers thrive here, and you can try bell peppers. Veggies in the squash family, like pumpkins and cucumbers, also enjoy the weather. If your temps regularly get over 90s, look into shade sails or another shade structure to give your garden a break from the intense heat and humidity. The sun is so strong here that the full sun recommendation that works on the continental U.S. might be too harsh here. Potted plants, container gardening, or hydroponics give you extra flexibility to control the amount of shade and sun for best results.

Start Seeds Indoors
Save money and gain the satisfaction of growing your garden from seeds by starting them indoors. We've got all the seed starter supplies you'll need. For best results, you'll want warming lights or a warming mat to go with your seed tray or planter pots. If you're planting a larger garden, use seed trays — like the ones you see sprouts in at your Mapunapuna Garden Center — to make it easy to stay organized and plant tiny soil plugs later. You can also use pots with seed starter mix and potting soil.

Measure your finger to use it as a ruler. In general, you'll plant 3–5 seeds, then press them into the soil to the depth you need with your finger. Mark where you planted the seeds with a plant tag or toothpick. Otherwise, it'll be a surprise when the sprouts push out of the soil.

Sprouts
Prepare your seed sprouts for outdoor life while they're still indoors. These inch-tall micro-seedlings are fragile but resilient. Seedlings certainly don't get all this pampering in nature when they volunteer and grow wherever they please, so they can handle more than you think. However, don't go overboard, as your sprouts are still babies. You can even use an oscillating fan on low to mimic the wind and strengthen their stems.

Harden Your Seedlings
Harden your seedlings for strong plants. On days above 45 degrees, take your pots or trays of seedlings outside to slowly warm in the shade for two hours, but bring them inside at night. They're not ready for direct sunlight yet or harsh nighttime temps. Gradually add more outside time each day, gently introducing your plants to the sun. After a week or more of this, you can leave them out overnight if the temps stay above 50 degrees. Cover your plants if they're in the ground and a late-season frost sneaks back in.

Transplant Young Plants Into Their New Homes
Place your transplants in the ground, then water them well. Blanket the surrounding area with mulch, marking where the plant is with a tag so you can easily find it among the grass clippings, old leaves, or straw. If your yard is regularly visited by rodents or deer, consider putting up chicken wire or other protective measures so your plants and veggies are less likely to get eaten before they thrive.

Protect Your Garden With Mulch
Finish it all off with mulch and compost. Compost enriches the soil so your garden can grow even better. It may help foster stronger plants that bear more flowers and fruit. Mulch controls weeds and keeps your soil from drying out. Mulch and compost can be purchased in-store or created at home. 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 fertilizer, seeds, and soil you need in the aisles of your Mapunapuna Garden Center, online, or on our mobile app. Let's get growing together.

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