Vegetable · Cucurbitaceae
Honeydew Melon
Cucumis melo
Give it full sun, warm soil, and a long season, and honeydew pays you back with sweet, cooling fruit by late summer.
Full sun
Every 7–10 days
70–90°F · 21–32°C
80–110 days
Overview
Honeydew is that smooth, pale melon you see toward the end of summer, the one with creamy skin and sweet green flesh. It's a warm-season vine in the gourd family, and here's a fun fact: it's the same species as cantaloupe, just a totally different thing to eat. Cantaloupe's netted and musky, while honeydew stays waxy-smooth and clean-tasting.
There are really two things that make honeydew its own beast in the garden. It wants a long, warm season of 80 to 110 days to sweeten all the way, and it never slips off the vine like a cantaloupe does. That second one catches a lot of new growers, who keep waiting for the fruit to drop and end up picking too late. So how do you know it's ready? Watch for the rind turning creamy and the blossom end giving a little under your thumb.
None of that makes honeydew tricky, but it does want some patience and steady conditions. Give the vines room to sprawl, water deep but not too often, and pick a bright, open spot where the air keeps moving. Crowd them or leave the leaves wet, though, and you're basically inviting the mildews and wilts that can cut a melon crop short.
Care
The short version: honeydew wants full sun and warm, fertile, well-drained soil, plus deep watering of about 1 to 2 inches a week that you dial back the last week so the sugars build up. Give each plant plenty of room and a long, warm season to ripen.
Light
Honeydew wants full sun, and the more direct hours it gets, the better. Sun is what builds up the sugars, so a plant stuck in shade gives you watery, flavorless fruit even if everything else goes right.
Water
Water deep but not too often, around 1 to 2 inches a week, and let the soil dry out a bit between drinks instead of keeping it soggy. Here's the trick that matters most: cut back on water the last week before harvest, because a late soaking dilutes the sugars and flattens the flavor.
Soil
Plant in fertile, well-drained sandy loam with plenty of organic matter mixed in. A slightly acidic pH of 6.0 to 6.5 works well for honeydew, and good drainage keeps the roots and crown clear of the rots that thrive in heavy, wet ground.
Temperature
Honeydew does best in real warmth, somewhere between 70°F and 90°F (21°C to 32°C). It won't put up with frost at either end of the season, and cool, cloudy spells drag out ripening and leave the fruit bland.
Humidity
Regular outdoor humidity is fine, so there's no number you need to hit. What matters way more is airflow, because still, damp air around crowded leaves is exactly what powdery and downy mildew are waiting for.
Feeding
Mix a balanced fertilizer like 5-10-10 into the bed before you plant, then side-dress with a nitrogen feed such as 21-0-0 once the vines start to run. Keeping them fed through that vining stage builds a strong plant that can carry the fruit.
Pruning
Honeydew doesn't really need pruning. You can pinch back the vine tips to keep a sprawling plant inside its bed, and in a short season it helps to snip off the very late blossoms so the plant puts its energy into ripening the melons it's already got.
Repotting
No repotting to think about here, since honeydew grows as an annual that's direct-sown or transplanted just once. If you start seeds early, use biodegradable pots and plant the whole pot, because the roots really hate being disturbed.
Size & spacing
The vines sprawl 6 to 9 feet (183 to 274 cm) long, so give them room to wander. Set plants 18 to 24 inches (45 to 60 cm) apart and leave nice wide aisles between rows for the runners and to let air move through.
When to plant
Honeydew can't handle cold at all, and it needs a good long stretch of warmth to sweeten up. Start seeds indoors a few weeks before the last frost, wait to set the plants out until the soil's really warmed, and pick from late summer into early fall as the rinds turn creamy.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: start in biodegradable pots 2 to 4 weeks before the last frost; melons resent root disturbance
- Plant: transplant or direct-sow after frost once soil is 60 to 70°F (16 to 21°C)
- Harvest: harvested late summer into early fall when the rind turns creamy and the blossom end softens
Hardiness
USDA hardiness zones: 3–11
Temperature: down to -40°C
Troubleshooting
Most honeydew problems show up on the leaves and vines first, with the odd letdown waiting in the fruit at harvest. Catch the early signs and you can jump in before a fungus or a beetle takes down the whole crop. Find what matches below, then act while it still makes a difference.
Vines going limp even though the soil's damp
A vine flopping over even though the soil's plenty wet? That's usually bacterial wilt, and cucumber beetles are the ones passing it around. Want to be sure? Cut a wilted stem, press the ends together, then pull them apart slowly and watch for sticky white threads. Sadly there's no saving a sick vine, so pull it, get rid of it, and go after the beetles before they hand it to the next plant.
Fix:
- Remove and destroy infected vines
- Control cucumber beetles promptly
Runners going yellow and dying on just one side
When a vine goes down lopsided, yellowing and dying on just one side, that's the tell for Fusarium wilt, a soil fungus that clogs the plant from the inside. Split a wilting stem and you'll spot brown streaks running through it. There's no fixing it, so pull the plant and keep it out of the compost, then next time lean on resistant cultivars and rotate the bed for 3 to 4 years.
Fix:
- Remove affected plants; there is no cure
- Do not compost diseased vines
Sunken stem cankers weeping amber gum
Reddish, gummy goo weeping out of the stems is a sign of gummy stem blight, a fungus that shows up in warm, wet weather and rots the fruit too. Look for tan spots on the leaves and tiny black specks in the tissue to double-check. Cut out and destroy the sick vines, hit it with a labeled fungicide, and move the bed well away from cucumbers and squash next season.
Fix:
- Remove and destroy infected vines and debris
- Apply a labeled fungicide
- Rotate away from cucurbits
Dusty white splotches showing up all over the leaves
See a dusty white bloom on the leaves? That's powdery mildew, a fungus that settles in when warm air just sits still around crowded foliage. Open the vines up so a breeze can pass through, pull off the leaves that look worst, and only bother with a labeled fungicide if it keeps creeping along.
Fix:
- Improve spacing and air flow
- Remove badly infected leaves
- Apply a labeled fungicide if severe
Yellow blotches walled off at the leaf veins
Those sharp-cornered yellow spots that stop dead at the veins are downy mildew, and it loves cool, wet, muggy stretches. Turn a leaf over and you'll usually catch gray to purple fuzz on the back. Water early so the leaves dry out fast, give the plants more elbow room, and add a labeled fungicide if it starts to spread.
Fix:
- Improve airflow and drainage
- Water early so leaves dry fast
- Apply a labeled fungicide if severe
Nibbled leaves and blooms crawling with beetles
Those little yellow beetles wearing black stripes or spots are cucumber beetles, and honestly the chewing isn't the worst of it, the bacterial wilt they carry is. So keep young plants tucked under floating row covers until they flower, pick off any beetles you spot by hand, and save a labeled insecticide for when they really pile on.
Fix:
- Cover young plants with floating row covers until bloom
- Hand-pick beetles
- Apply a labeled insecticide if numerous
Curled, sticky leaves going black with mold
Leaves curling up and going sticky, with a black film on top? Peek underneath for melon aphids, which crowd there to suck sap and leave a sugary mess that sooty mold moves into. Knock them off with a strong jet of water first, follow up with insecticidal soap if any stick around, and let the lady beetles and lacewings do their thing. It also helps to keep ants away, since they'll actually protect aphids to farm their honeydew.
Fix:
- Spray plants with a strong jet of water
- Apply insecticidal soap
- Encourage lady beetles and lacewings
Melon ends up bland and never gets sweet
A flat, watery honeydew? Nine times out of ten it just came off the vine too early. Hold out until the rind turns creamy and the blossom end gives a little under your thumb, because honeydews don't slip loose the way cantaloupes do. And ease off the water that last week before you pick, since a big late drink thins out all that sugar.
Fix:
- Leave fruit on the vine until the rind turns creamy and the blossom end gives slightly
- Reduce watering during the last week before harvest
Toxicity
Got pets? Good news: every part of the honeydew plant is non-toxic, and the ripe flesh is a safe, refreshing treat to share. The only real cautions are the common-sense kind, since the tough rind and seeds are hard to digest and are best kept off an animal's plate.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
A little bite of ripe flesh won't hurt a cat one bit. Go overboard and about the worst you'll get is some loose stool, since cats aren't built for much fruit sugar.
Dogs None
Ripe honeydew makes a great now-and-then treat for a dog. Just keep the pieces on the small side, because a big scoop of that sweet flesh can leave a pup with a mild upset stomach.
Horses None
A slice of the flesh sits just fine with a horse, no worries there. Leave out the rind, though, since it's tough and easy to choke on.
Rabbits None
The flesh is safe in tiny amounts, even if it's pretty rich and sugary for a rabbit. A thumbnail-sized bit every so often is really all they need.
Livestock None
Goats, sheep, and cattle can munch melon scraps with no harm done, and most of them love the stuff. The vines and leaves are fine too, nothing toxic in there.
Birds None
Chickens and other backyard birds will happily peck at ripe honeydew and the seeds. There's nothing toxic anywhere in the plant to worry about.
People None
Ripe honeydew is a sweet, cooling fruit folks enjoy all over the world, and it's perfectly safe for everyone, kids included.
Offer only small amounts of ripe, seeded flesh; rind and seeds are tough to digest and can cause stomach upset or choking.
Varieties
Honeydew varieties mostly sort out by how fast they ripen and what color the flesh is. Here are the ones worth knowing when you're picking out seed.
Honey Dew (Green Flesh)
This is the winter melon everybody pictures, with a smooth, waxy rind that shifts from cream to pale green over sweet, pale green flesh, and it hangs on tight to the vine instead of dropping off.
Earlidew
It's a green-fleshed honeydew that ripens in a hurry, which makes it a handy pick if your season's on the short side.
Temptation
It's an early hybrid built to sweeten up fast in those cooler, shorter-season gardens where a honeydew might otherwise turn out bland.
Orange-fleshed honeydew
From the outside it's the same smooth pale rind as a green honeydew, but slice it open and you'll find salmon-orange flesh.
How to propagate
Honeydew comes from seed and not much else, so the whole job really boils down to sowing at the right time and being gentle with those tender roots.
SeedEasy
Start indoors 2 to 4 weeks before the last frost, or direct-sow after soil reaches 60 to 70°F (16 to 21°C) · Germinates in about 4 to 10 days at 70 to 90°F (21 to 32°C)
Seed is pretty much the only way to grow honeydew, and it's easy enough. Start it indoors 2 to 4 weeks before your last frost, or pop it straight in the ground once the soil holds at 60°F to 70°F (16°C to 21°C), and in warm soil you'll see sprouts in 4 to 10 days. Sow into biodegradable pots and plant the whole pot, because melons really don't like having their roots messed with.
Myths
A ripe honeydew simply falls off on its own, the same as a cantaloupe.
Nope, honeydews just don't slip. The fruit holds on tight and has to be cut from the vine, so if you're waiting for it to drop off, you'll only end up with an overripe melon. Go by the other cues instead: it's ready when the rind turns creamy and the blossom end softens.
Soaking the plants just before you pick sweetens the melon.
It's actually the opposite. Dumping water on in that last week of ripening dilutes the fruit and washes out the sweetness. The sugar comes from full ripening and sunshine, so you want to ease back on the water as harvest gets close.
A honeydew is basically another cantaloupe.
It's easy to mix them up, and sure, they're the same species, Cucumis melo, but they land in different groups. Honeydew is a smooth-skinned winter melon in the Inodorus group, while cantaloupe and muskmelon have that netted rind of the Reticulatus group, and the two ripen and come off the vine in their own ways.