June in the Garden: What to Harvest, Dry, and Let Go to Seed

If you’ve been watching your garden and wondering why it feels like everything is happening at once right now; you’re not wrong. June is one of the most active months in the garden, but maybe not in the way you’d expect. The big summer vegetables aren’t really ready yet. Tomatoes are still green, squash is just getting going, and the beans are climbing but not producing. What June belongs to, entirely and completely, is herbs.

We’re right on the edge of the summer solstice (the longest day of the year) and plants know it. The increasing daylight hours trigger a surge of growth that’s almost visible if you’re paying attention. Herbs that were quietly establishing themselves in May suddenly bolt upward, leaf out, and push toward flowering. It’s the most productive photosynthesis window of the entire year, and your garden is making full use of every minute of it. If you want to understand why the solstice matters beyond the garden, I wrote about it this week.

In my garden right now the harvesting baskets are full of lavender, calendula, self heal, St. John’s Wort, thyme, sage, nettles, and about four different kinds of mint. The raspberries are just starting and the strawberries are in full swing. The cool-season vegetables — kale, cabbage, radishes, kohlrabi, peas — are either finishing up or bolting toward seed. It’s a transitional month, and once you learn to read it, it becomes one of the most satisfying times of year to be outside with your hands in the plants.

Here’s what I’m harvesting right now, what I’m letting go to seed, and a few things worth knowing before you head out to your own garden.

What’s Ready to Harvest in June

The best way I can describe a June harvest is abundant and a little bit wild. Here’s what I’m picking from my garden right now:

• Lavender is at its most fragrant just as the flower buds are forming but before they fully open. That’s your window. Cut long stems, bundle them loosely, and hang them upside down somewhere with good airflow. They’ll dry beautifully and your house will smell incredible for months.
• Calendula is one of my favorite June harvests because the more you pick, the more it gives you. Harvest the fully open flower heads regularly and it will keep blooming all summer long. Let even a few go to seed and you’ll have volunteers coming up in unexpected places next year — which I personally consider a gift.
• Self heal is a quietly wonderful little plant that most people walk right past. It grows low to the ground and its small purple flower spikes are easy to miss. Harvest the whole aerial part — leaves, stems, and flowers — when it’s in bloom.
• Nettles should ideally be harvested before they flower, and always with gloves. I know that feels obvious but I have learned this lesson more than once. The young tops are the most tender and potent. Dry them for tea, wilt them into soups, or infuse them in oil — they’re incredibly nutritious and one of the most underrated herbs in the garden.
• Mints  (I’m growing at least four varieties right now) are right at that perfect pre-flowering stage which I’ll talk about more in the next section, because the timing really matters.
• St. John’s Wort blooms right around the solstice, which is no coincidence — it’s been tied to midsummer celebrations for centuries. Harvest the bright yellow flowers and buds when they’re just opening and infuse them in oil while they’re fresh. I wrote an entire post about harvesting and working with St. John’s Wort if you want to go deeper.
• On the fruit side, strawberries are in full swing and raspberries are just beginning. Pick them as they ripen — they won’t wait for you.
• As for the cool-season vegetables, peas, radishes, kale, cabbage, and kohlrabi are all winding down. Eat what’s left, and start thinking about what the radishes are doing — because some of them are probably already bolting, which we’ll get to in a bit. If you only take one thing away from this post, let it be this: for almost every herb in the mint family — thyme, sage, oregano, mint, lemon balm, self heal, and more — the best time to harvest is just before the plant flowers.

The Mint Family Rule — The Most Important Thing I Can Tell You About Harvesting Herbs

 As a plant approaches flowering it concentrates its volatile oils (the compounds responsible for flavor, fragrance, and medicinal potency) into its leaves and stems. It’s putting everything it has into that moment. Once it starts flowering, those oils begin to redistribute as the plant shifts its energy toward making seeds. You can still harvest after flowering, but the leaves will be less potent and less flavorful than they were a week earlier.

So for thyme and sage especially, watch them closely in June. When you see those first tiny flower buds forming but before they open — that’s your moment. Cut generously, dry what you can’t use fresh, and feel good about it.

But what if you miss the window?

Honestly? Let the bees have it. Thyme flowers and sage flowers are some of the most beloved bee plants in the summer garden. If you’ve ever watched a patch of flowering thyme on a warm afternoon you’ll know what I mean, you can hear it buzzing. Missing the harvest window is not a loss, it’s a gift to the pollinators, and that matters. I've written an guide to plants for pollinators in Northern Utah if you live in Utah and want to support our local pollinators. 

Once the flowers die back you get a second chance. At that point you can harvest the leafy growth again (the plant will have put its energy back into its foliage) just do it before it sets seed if you don’t want a hundred baby plants coming up everywhere next year.

What if you want the seeds?

Then patience is everything. Wait until the seed heads are turning brown but haven’t started dropping yet. With mint family plants this is a narrow window because the seeds are TINY and once they start falling you’ll lose most of them before you realize it’s happening. Watch them closely, harvest into a paper bag, and let them finish drying indoors.

What to Let Go to Seed (and What Not To)

If you’ve walked out to your garden recently and noticed your radishes have shot up two feet tall with cheerful little flowers on top, congratulations — your radishes have bolted. This is not a failure. It’s just the plant doing what plants do when the days get long and warm: deciding it’s time to make the next generation.

Bolting means the plant has shifted its energy from producing the root or leaf you were after toward making flowers and seeds. For eating purposes, the moment has passed — bolted radishes get woody and sharp. But if you let those flowers go and watch what happens next, you’ll end up with papery little seed pods you can save, dry, and replant in late summer for a fall crop. That’s not a wasted plant, that’s a free packet of seeds.

The question of what to let go to seed really comes down to intention. A few things worth thinking about:

• Let it seed if you want to save that variety for next year, you want the plant to naturalize and come back on its own, or you’re growing something the pollinators love and want more of.
• Pull it before it seeds if it’s a variety you don’t want spreading — some herbs self-seed so enthusiastically they’ll take over a bed if you let them. Lemon balm, I’m looking at you. Calendula, same. Beautiful plants, prolific self-seeders. Deadhead them unless you have a plan for the babies.
• For most herbs the sweet spot is somewhere in the middle — let a few plants go to seed each year to keep the population healthy and give you something to save or share, and harvest the rest at peak. It doesn’t have to be all or nothing.

Keep an Eye on Your Garlic

While we’re talking about timing, garlic deserves a mention because it’s almost ready and most people either pull it too early or miss the window entirely and then the head start to separate.

The sign to watch for is the leaves. Garlic is ready to harvest when the lower leaves have turned brown but there are still a handful of green ones at the top — usually around six or so. Too many brown leaves and the papery wrapper around the bulb has started to break down, which affects how long it will store. Pull it too early and the cloves won’t have finished sizing up.

In Northern Utah, we’re usually looking at late June into early July depending on the variety and the year. Start checking yours now.

Garlic is one of my absolute favorite things to grow — it’s planted in the fall, winters over in the ground, and comes up in spring like an old friend. It also happens to be one of the most powerful medicinal plants you can have in your kitchen. I’ve written a full guide to growing, harvesting, and processing garlic over on the blog — it covers everything from curing to storage to why I always keep a braid hanging in my kitchen.

Slow Down and Enjoy It

June moves fast. Faster than you think it will when you’re standing in the garden in early spring wondering if anything is ever going to grow. And then suddenly everything is growing at once, the days are long and golden, and the harvesting baskets are full before you’ve even had your morning coffee.

If there’s one thing I’ve learned after years of tending herbs it’s that June rewards the people who show up and pay attention. Not the people with the most elaborate garden or the most organized drying shed — just the ones who are out there looking, noticing, and picking things at the right moment. That’s really all it takes.

So if you haven’t been outside yet today, go. Look at what’s flowering, what’s bolting, what’s ready to cut. Your garden is doing something interesting right now and it won’t look exactly like this again until next June. 

I’d love to know what’s happening in your garden this month — what are you harvesting? Any surprises coming up? Tell me in the comments below, I read every one. 🌿