Planting Garlic in Arizona This October: Cloves Now, Bulbs by Early Summer

Every October I get the same itch. The summer beds are tired, the okra looks ragged, and the nights finally drop below seventy. That is my signal to dig out the garlic I saved last spring and start breaking bulbs into cloves. Garlic is one of the easiest, most patient crops in the Arizona low desert. You tuck cloves in this month, mostly ignore them through winter, and dig full, papery bulbs around May or June.

Here is how I plant, water, feed, and harvest garlic in our heat, plus the varieties that actually behave themselves down here.

Why October Is the Sweet Spot in the Low Desert

Garlic needs a long, cool season to build roots and leaves before it starts making a bulb. In Phoenix, Tucson, and the rest of the low desert, that window opens in October and stays open into November. Planted now, the cloves have warm soil to root quickly but cool air to keep the tops calm. By the time our winter arrives, each plant has a strong root system and a fan of green leaves ready to soak up sun.

The bulbing part is triggered by lengthening days and warming temperatures in spring. If you plant too late, say in January, the plant does not have enough leaves when that trigger hits, and you get small bulbs. If you plant too early, in a hot September, cloves can rot in warm wet soil or sprout and then stall when the heat comes back. I aim for mid-October through mid-November and call it good.

Up in Prescott or Flagstaff, timing shifts earlier and varieties change. This post is for the low desert, where winter is mild and spring heats up fast.

Softneck vs Hardneck: What Grows Best in Arizona

There are two big families of garlic, and the difference matters a lot in a warm climate.

Softneck garlic does not send up a stiff flower stalk. The neck stays soft and bendable, which is why softnecks are the ones you see braided. They need less winter chill, mature a bit earlier, and store the longest. For the low desert, softnecks are the safest bet.

Hardneck garlic grows a stiff central stalk called a scape. Hardnecks usually have bigger, easier-to-peel cloves and rich flavor, but most of them want a real cold winter to form a good bulb. Our mild winters often leave them undersized or unsplit, more like one round clove than a proper head.

Within those families, here are the types I have had the best luck with or have heard good things about from other desert growers:

- Artichoke types (softneck): California Early, California Late, Inchelium Red, and Lorz Italian. These are vigorous, forgiving, and store well. If you only plant one kind, start here.

- Creole types: Ajo Rojo, Burgundy, and Creole Red. These love warm climates, have gorgeous rosy cloves, and store a long time. Botanically they are a bit odd, sometimes making weak scapes, but they handle Arizona springs very well.

- Silverskin types (softneck): very long storage and great braids, though a little slower to mature.

- Elephant garlic: not true garlic, it is actually a leek relative, but it grows like a champ in the desert and makes huge mild cloves.

If you really want a hardneck favorite like a Rocambole or Porcelain, you can try pre-chilling the cloves in a paper bag in the refrigerator for six to eight weeks before planting. Keep them away from fruit, since ripening fruit gives off ethylene. It is an experiment, not a guarantee.

Skip grocery store bulbs, which are often grown for other climates or treated to slow sprouting. Buy seed garlic from a local nursery, a seed company, or a neighbor with a proven crop, then save your biggest bulbs each year.

Getting the Soil Ready

Garlic is not fussy, but it loves loose, rich, well-drained soil. Our native desert dirt tends to be alkaline, low in organic matter, and either sandy or packed like adobe.

I grow mine in raised beds and mix two to three inches of finished compost into the top eight inches before planting. You want soil that crumbles in your hand and drains after a soaking instead of puddling.

Pick a spot with full winter sun. The corner of a bed shaded by a block wall in December is not the place.

Planting Depth and Spacing

This is the fun part. Right before planting, break a bulb apart into individual cloves. Leave the papery skin on each clove. Use the biggest, fattest cloves for planting, since big cloves make big bulbs. The tiny inner ones can go straight into the kitchen.

Plant each clove pointy end up and flat root end down, about two inches deep. Space them four to six inches apart, in rows about twelve inches apart. In a raised bed I often plant a grid with about five or six inches between every clove in every direction. It looks sparse at first, but they fill in.

After planting, water deeply, then add a light layer of straw or shredded leaf mulch to hold moisture and block weeds. Green shoots usually show up within one to three weeks.

Watering Through Winter

Garlic likes steady moisture, not swampy soil. In fall, while it is still warm, I water deeply about every four to seven days, depending on the weather. Once winter settles in and we get a few rains, I stretch that out, sometimes to every ten days or longer. Stick a finger in the soil. If it is dry two inches down, water.

Drip irrigation on a timer is perfect for garlic during the busy holidays. Just adjust it as the weather changes. Overwatering in cool weather invites rot, and underwatering in spring makes small bulbs.

Here is the big one: once the lower leaves start browning, about two to three weeks before harvest, stop watering so the wrappers dry and tighten for storage.

Feeding for Bigger Bulbs

Garlic is a moderate feeder that cares most about nitrogen early in the season. The compost at planting covers a lot. Then I side-dress with a balanced organic fertilizer or a nitrogen-rich one like blood meal or a fish emulsion in late December or early January, and again in early February.

By March, I stop feeding. That is when the plant shifts from making leaves to making a bulb. Extra nitrogen at that point just pushes more leaves and can make bulbs that do not store as well.

Keep weeds pulled all season. Garlic has narrow leaves that do not shade out competitors, and it really does not like sharing root space. A few minutes of weeding every week is all it takes, especially with a mulch layer.

Green Garlic and Scapes: The Bonus Harvests

You do not have to wait until summer to taste your crop. In January and February, I pull a few plants on purpose as green garlic. It looks like a skinny leek, and you use the whole thing like a mild garlicky scallion in eggs, soups, and stir-fries. I plant a few extra cloves just for this.

If you grow hardneck or some Creole types, you may see scapes in spring. A scape is the curly flower stalk that shoots up from the center. Snap them off when they make a loop or two. That sends energy back to the bulb instead of into flowering. Do not toss them. Scapes are tender and taste like garlic mixed with green beans. Grill them, chop them into pasta, or blend them into scape pesto with olive oil, nuts, and Parmesan.

Pests and Problems

Garlic is tough. Thrips can leave silvery streaks on spring leaves; a strong spray of water or insecticidal soap handles them. Rust, orange speckles on the leaves, shows up in damp, crowded beds, so give plants room and water the soil, not the leaves. A plant that yellows and wilts early usually means rot from soggy, cool soil.

Harvest Time: May to June

In the low desert, most garlic is ready to dig sometime between late April and early June. Softnecks and Creoles tend to be earlier, while big artichoke types might take until early June. The sign I watch for is the leaves. Each green leaf above ground matches a papery wrapper around the bulb below. When about a third to half of the lower leaves have turned brown, while the top five or so are still green, it is time.

Dig too early and bulbs are small; too late and the wrappers split and storage life drops.

Do not yank garlic out by the leaves. Loosen the soil beside the row with a garden fork and gently lift the bulbs out. A sturdy digging fork makes this much easier. Something like this works great: https://www.amazon.com/s?k=garden+digging+fork&tag=greenthumbh0a-20

Brush off loose dirt, but do not wash the bulbs. Leave the leaves and roots attached for now.

Curing in Arizona Heat

Curing is just drying the garlic so it keeps for months. The usual advice is a warm, airy, shady spot for two to four weeks. The catch in Arizona is that a June garage can easily climb past 110 degrees, which basically cooks the bulbs.

I cure mine somewhere shaded, airy, and reasonably cool, like a covered patio with a fan or a spare room. Hang bundles of six to ten plants, or lay them on a wire rack, out of direct sun.

When the necks are dry and tight, and the outer wrappers feel papery, curing is done. Trim the roots, cut the stems about an inch above the bulb, or braid the softnecks while the leaves are still a bit flexible.

Storage That Lasts

Store cured garlic somewhere cool, dark, and dry, with good airflow. Mesh bags, baskets, or hanging braids all work. Avoid the fridge for long-term storage, because the cold and humidity can cause sprouting or mold. Softnecks stored well can last six to nine months. Hardnecks usually keep three to six.

Set aside your biggest, healthiest bulbs for next fall's planting. Do not break them apart until right before you plant, since whole bulbs keep better.

How I Eat My Garlic

Homegrown garlic is bolder and juicier than store garlic. Some favorites:

- Roasted garlic: slice the top off a bulb, drizzle with olive oil, wrap in foil, and roast until soft. Squeeze onto bread.

- Garlic confit: peeled cloves cooked low in olive oil until tender. Refrigerate and use within a week.

- Toum: fluffy Lebanese garlic sauce with oil, lemon, and salt.

- Fresh salsa: a clove or two with tomatoes, chiles, cilantro, and lime.

My Simple Garlic Calendar

- October to mid-November: prep beds, plant cloves, water in, mulch.

- December to February: water as needed, feed twice, weed, pull a few for green garlic.

- March: stop feeding, keep watering steady.

- April: snap off any scapes.

- May to early June: stop watering when lower leaves brown, then harvest.

- June to July: cure, trim, braid, and store. Save seed bulbs.

That is it. A handful of cloves this month turns into a basket of bulbs by early summer. If you have never grown garlic in the desert, this is your year.