Summer squash arrives faster than most gardeners expect and goes soft faster than they hope. The fruit is ready while it is still small and glossy, and a week in the refrigerator is the ceiling once it is picked. Anything beyond that belongs in the freezer or a jar. Where summers run hot and humid, the timing of each step matters more than the calendar.
When summer squash are ready in Texas
Pick summer squash when the fruit is small, the skin is glossy, and a thumbnail pierces it with light pressure, which happens about 55 days after sowing according to Clemson Cooperative Extension. For the Houston area, the average last spring freeze falls between February 4 and March 1, so seed sown on March 1 starts producing around April 25, and seed sown on March 15 around May 9.
Those frost dates come from NOAA’s 1991-2020 Climate Normals for Houston’s Bush Intercontinental airport, using the 30 to 70 percent probability band for a 32°F freeze. They describe the mild Gulf end of a very big state. Texas spans USDA zones 6a to 10a on the 2023 Plant Hardiness Zone Map, and the Panhandle freezes months earlier in fall and months later in spring. Even inside Houston, Hobby airport runs about two weeks milder than the Intercontinental station. Squash is frost tender, so find the last-freeze date for your own town, sow after it, and add the 55 days. Your county office of Texas A&M AgriLife Extension can give you that date.
How do you tell a summer squash is ready to pick?
Go by the skin. A fruit at its best has a shiny surface that gives under a thumbnail and is closer to the size of your hand than your forearm. Once the skin turns dull and hard and the fruit has swollen, the seeds have toughened and the flesh is watery. Cutting it open is a fair test: a tender fruit has small, soft seeds. If you are still choosing what to plant, The Best Summer Squash to Grow in Texas covers which types hold up in the heat.
How often should you pick, and what about a fall crop?
Check the plants every day or two in warm weather. A summer squash plant stops setting new fruit once one fruit matures on it, so one forgotten giant can shut down production for days. Picking small and often is what keeps the yield coming.
The fall window is tighter. The average first fall freeze at the Houston reference station falls between December 1 and December 19. Counting back 55 days from December 1 lands on October 7, and the plant needs several weeks of picking after that. A mid-August sowing starts producing around October 9 and leaves room to harvest. The catch is August itself. The reference station reaches 90°F or more on 102.4 days a year, and June through August bring about 14.6 inches of rain (6.0 in June, 3.77 in July, 4.84 in August). Sandy soil drains that rain within the day, while clay holds it for a week, so a sandy bed can still need watering every second day. A rain gauge on your own plot settles it better than any normal. Late sowings also draw bugs, and What Eats Summer Squash in Texas, and When explains what to watch for.
Keeping them, and for how long
Summer squash does not store. Clemson Cooperative Extension’s guidance is to put summer squash in a plastic bag in the refrigerator, where it keeps for up to 1 week. That is a maximum under good conditions, reached with fruit picked young and undamaged. A squash that sat in the sun on the vine, got bruised in the basket, or waited on a warm counter will not make it that long.
The skin is the reason. Winter squash and pumpkins grow a hard rind and cure for months in a cool spot. Summer squash is eaten before the rind forms, so its thin skin is the only barrier against moisture loss and rot. A cellar or pantry will not change that, and neither will a longer wait. Plan on eating it within the week or processing it.
What do you do with a glut of summer squash?
A glut is the normal state of a healthy plant in early summer. A few hills can outrun a household, so decide before the first big pick where the extra goes. Freezing and preserving are the real answers, and giving some away is a good third. The usual options are:
- Shred it, pack it in portions, and freeze it for bread, muffins, fritters, and soups.
- Slice or cube it, blanch it briefly, cool it fast, and freeze it flat on a tray before bagging.
- Make pickles or relish from a tested recipe, since acid levels in preserving are not something to improvise.
- Cook it down into sauces or casseroles and freeze those in meal-size containers.
- Hand the surplus to neighbors, a church pantry, or a community fridge while it is still fresh.
Oversized fruit still has a use. The tough seeds and watery flesh are poor for slicing, but a shredded fruit with the seeds scooped out goes into baking and the freezer without complaint. For preserving instructions, ask your county AgriLife Extension office for tested guidance rather than trusting an unverified recipe, because the safe methods vary by food and by method.
Picking young also helps with storage. Small fruit carries less water, holds its texture better in a bag, and gives the plant a reason to keep flowering. If your harvest looks too big for a single week, you may simply have planted more than you can eat. Growing Summer Squash in Texas covers how many plants a household usually needs.
Where in the house that actually is
The refrigerator is the closest match to the week-long storage Clemson describes, but a domestic fridge is uneven. The back wall and the top of the cooling vent run colder than the door, and squash is easily damaged by cold. Fruit left against the back wall can come out pitted, sunken, or with watery patches. The crisper drawer, with the squash in a plastic bag, is usually the gentlest spot because it sits away from the vent.
Heated rooms fail in the other direction. A kitchen counter in a Texas summer is warm, and the reference station sees 90°F or more on 102.4 days a year, so even an air-conditioned house can have warm corners near windows and stoves. Squash left out will soften and shrivel quickly. A counter works for a few hours while you gather a batch and decide what to cook, and no longer.
The garage and the porch are the worst choices. Their temperature follows the weather, so a cool morning can become a hot afternoon, and a garage that feels fine in October can bake in June. A storage spot only works if it stays steady, and those two do not.
Put a thermometer in the crisper drawer and leave it overnight before you trust it with a harvest. Try the back shelf and the door the same way and note the difference. If the drawer runs much colder than the rest of the fridge, move the squash to a warmer shelf, keep the bag loose so moisture does not pool, and check the fruit every couple of days. Skipping this step can cost you a whole basket of squash that looked fine on Monday and turned slimy by Thursday.
Common questions
How big should summer squash be when I pick it?
Pick it while it is small, with glossy skin that a thumbnail can dent. Zucchini and yellow squash are better at hand length than forearm length. Tough, dull skin means it has gone past its best.
Can I leave summer squash on the plant to get bigger?
You can, but it costs you. The plant stops setting new fruit once one fruit matures, so leaving a fruit to grow slows the harvest. Remove oversized fruit and use it for shredding.
Do I wash squash before putting it in the refrigerator?
Brush off soil and wash it just before you cook or freeze it. Moisture trapped in the bag speeds rot. Keep the fruit dry, bag it, and put it in the crisper.
Where do I find a planting calendar for my part of Texas?
Ask your county Texas A&M AgriLife Extension office. The state runs from USDA zone 6a to 10a, so the Houston dates above are the Gulf Coast end and the Panhandle, Hill Country, and North Texas each follow their own calendar.