Gardenig in Netherlands. Tips & Guides

Growing onions is a popular task for millions of gardeners and knowing when to harvest red onions – along with yellow and white varieties – is important for success. If you harvest onions too early, it means a limited storage life. But, harvesting too late could mean a split or rotten bulb. In this article, I’m going to review two perfect times for harvesting red onions. One is ideal for fresh use and the other is best for optimizing storage life.

A little while ago, I told you about a preliminary experiment that Dr Wieger Wamelink and his team at the University of Wageningen conducted. It demonstrated that it is possible to grow plants in simulated Mars and Moon soils. 

Can we grow food on the Moon or Mars? That was the question that started Dr Wieger Wamelink, ecologist and exobiologist at the University of Wageningen in the Netherlands, on a research quest in 2013.

Hello, and welcome to Gardeners Off World! I am writing this from lockdown, and you’re probably reading it from lockdown, too. The good news for UK gardeners is that it’s still OK for most people to do some gardening – and that includes people who grow their food on an allotment.

ESA’s ESTEC (European Space Research and Technology Centre) held their annual open day over the weekend. One of the projects on display was part of the MELiSSA (Micro-Ecological Life Support System Alternative) project, which is investigating ways to use microbiological cells, chemicals, catalysts, algae, bacteria and plants to process waste and deliver continuous supplies of oxygen, water and food.

Welcome to Gardeners off World, my weekly round-up of the exciting world of interplanetary gardening!

Join Emma the Space Gardener as she explores gardening on Earth… and beyond! In this episode, Emma talks to Grace Crain, a researcher on the MELiSSA project developing circular life support systems. 

Header image: Geoff Caddick/EPA

A new year is just around the corner and paint brands have already started announcing their colors of the year. Color, whether through paint or decor, is the simplest way to evoke a feeling in a room. These colors range from traditional to truly unexpected, setting the bar for just how creative we can be in our homes. Whether you're looking for tones that evoke tranquility and calm, or just want to spice things up with something unexpected, The Spruce has got you covered.

Stargazer Lily has garnered a lot of attention, thanks to its enormous blooms and colors! Here’s everything you need to know about growing it easily!

Reviews and recommendations are unbiased and products are independently selected. Postmedia may earn an affiliate commission from purchases made through links on this page.

Courtesy of Dutch Boy Paints

Ornamental Japanese Maples are widely available for planting in your garden. The autumn colouring makes these trees spectacular when planted en mass in a woodland or Japanese garden setting.

The best trees for chalk soil conditions tend to be locally grown and not be Dutch imports. In fact they resemble shrubs more than trees but there are the odd exception that are tree like.

Where would we be if there weren’t already numerous robots used in the gardening industry. Do you imagine there are thousands of Dutch gardeners pricking out the seedlings of the soon to be gaudy annuals on supermarket displays or thousands of Chinese coolies picking individual seeds for our packeted seed industry (well may be in this case).

Look out in other gardens for great bulbs to grow for next spring. This Grape Hyacinth called Muscari Azureum is a clear soft blue that is recommended for naturalising. Muscari Valerie Finnis is also blue whilst most of the  other species and varieties flower in shades of purple. Muscari grow well in pots where the foliage can look interesting.

Dutch Iris or Iris reticulata are small bulbs for pots or rockeries. Flag Iris are big and blousy and grow from Rhizomes. These pictures of different Iris are grown from bulbs.

It is the season for houseplants and this Solanum capsicastrum was raised from seed probably in a Dutch hothouse for the UK’s pre Christmas market.

For your amusement or irritation here are some Christmas gifts for your favourite Knome. Hey-Hoe if you want to grow ‘Hey’ then there is this special Hoe.

Slender deutzia (Deuzia gracilis) is a fantastic, but underused deciduous shrub for the sunny to partly sunny landscape. There are several cultivars of Deutzia available, and most produce a profusion of pure white, fragrant flowers during late April and early May. Deutzia will grow well in USDA Zones 5 to 8, which covers most all of South Carolina. In the warmer parts of the state, they will perform best with partial shade.

Looking for a new recipe to help use up your leftover Easter ham? Move over egg salad sandwiches and ham casseroles, and let me introduce you to ham balls! If you have never heard of ham balls you are in for a treat! Ham balls are a Pennsylvania Dutch delicacy. As a native Pennsylvanian, I grew up eating these ham/pork based “meatballs” and remember requesting them (along with scalloped potatoes and baked pineapple) for many birthday dinners. They are easy to make, a great way to use leftover ham, and they freeze well (before or after baking) for a quick-to-serve meal.

Are you frustrated because there are dandelions and other weeds in your lawn? Did you know that dandelion flowers provide one of the first springtime sources of pollen for bees, butterflies, and other pollinating insects?

I noticed that my friend Bob Hyland at nearby Loomis Creek Nursery is counting his twiggy blessings, too, this week—with an ode on his website to Salix ‘Swizzlestick,’ a distinctive corkscrew willow he grows as a dramatic 60-foot hedge.I’m making myself content with much less, but even a little ‘Winter Flame’ (hardy to Zone 4) warms the winter-weary soul. My young plant hasn’t reached full size of 8-10 feet, though at 4 feet it produces a show of yellow-, orange- and reddish-tinged stems that read as coral to my eye.The Dutch breeder of ‘Winter Flame,’ Andre van Nijnatten, has also developed a smaller-stature version called Cornus ‘Arctic Sun’ that is earning high pr

MY GARDENING LIFE STARTED with a hedge—cutting one back hard, specifically. It was the threadbare, tall old privet surrounding my childhood home, and I was determined to “rejuvenate” it, after reading about the process in a book. No artful hedge has ever been created by my hands, though—a fact that feels all the more lamentable after watching Sean Conway’s video tour (above) of designer and nurseryman Piet Oudolf’s garden in the Netherlands. What magic.

FIRST, A LITTLE SCIENCE LESSON: Fungi don’t have chlorophyll, so they cannot make their own food (like plants do), nor can they ingest it (like animals), except through absorption from their surrounding environment. Most fungi are saprophytes, meaning they feed on dead or decaying material, like the leaf litter of the forest floor—or the debris in your compost heap. Their second critical role: Most of the plant kingdom depends on symbiotic fungi called mycorrhizae, which inhabit the plants’ roots, to live. (Thank you for patiently listening to that.)I MADE PIZZA THE OTHER DAY (no, not a mushroom pizza), something I do a lot from scratch, and when the yeast acted oddly I did what any 21st century human does: I looked for an explanation online. I still don’t know what caused my yeast to misbehave, but here’s what I learned: The kind of yeast you bake with (or make beer or champagne with) are unicellular fungi, technically sp

‘Hot Summer’ (a 2010 release, but new to my garden this spring from Klehm’s Song Sparrow Farm) is one of an impressive selection of recent Echinacea hybrids that seem to be getting better and better, almost insisting that I wake up to coneflowers again and make some room.  It was discovered in the nursery of Marco van Noort, a Dutch breeder, in 2007.The most exciting thing about ‘Hot Summer’ (Zone 4-9; 30-36 inches tall) is that yesterday the flower in the top photo was another fiery shade altogether. Each 4 1/2-inch flower opens yellow-orange and passes through an aging process to deep red, so once you have a lot of flowers you can have the whole fiery spectrum on the plant at once (ca

I love ‘Sun Gold’ tomatoes, the tangerine-colored cherry, and wouldn’t be without one plant each year, but I’m always wishing there was a red cherry-sized fruit that was a little different—not your predictable ‘Sweet 100’ or ‘Sweet Million’ kind of character. The larger ‘Chadwick’s Cherry’ is someone special, but an indeterminate grower and later to yield. Perhaps in ‘Riesentraube’ I have finally found my dreamboat?‘Riesentraube’ (which means giant grape, probably for the way the fruits are bunched) is various said to have good flavor—beefsteak-like, says Southern Exposure—in a highly prolific plant that produces several hundred flowers and then giant clusters of 20 or even 40-plus fruits apiece. I can hardly wait, but I must, as it’s not time to start tomato seeds here yet by a longshot. Though some sources say ‘Riesentraube’ is a compact

Dan Long–proprietor of Brushwood Nursery aka gardenvines.com–is celebrating 15 years of selling an impressive assortment of hundreds of vining and climbing plants. He joined me from Athens, Georgia, on the latest radio show and podcast, to give us a tour through some upwardly mobile choices in the world of scented things. (Details on how to listen and subscribe free to the program are at the bottom of the page.)my fragrant-vine q&a with dan longQ. I mentioned the recent headlines of new fragrant Clematis–so maybe let’s start there before we talk jasmines and honeysuckles and even some passion flowers and climbing roses, among the many delicious possibilities. When I think fragrant clematis I think of C. mo

These may remind you of my popular vegetarian baked heirloom beans, but lentils cook much more quickly, and I don’t use molasses or the same spices in these as I do in the beans. That said, you could alternate either flavor with either “pulse,” and simply vary the cooking time.barbecue lentils, minus the grillingredients:1¾ cups lentils, rinsed (I use the basic greenish kind; black “caviar” ones are fine, too) Water to cover the lentils to twice their depth (about 4 cups) 1 medium onion, diced 2 cloves garlic, minced 1 Tablespoon oliv

It’s a staggering number. That would be a lot of holes to dig, or drill, as the Garden begins to enhance and expand its historic Daffodil Hill display first planted in 1920.What didn’t surprise me was the involvement of Brent Heath, a longtime bulb merchant and daffodil hybridizer himself, who’s acting as an adviser in the ambitious undertaking. Brent, whose grandfather began the family bulb business in 1900, joined me on my public-radio show and podcast from his B

I love clafoutis (kla-foo-tee), a humble French concoction that’s like a Huffy-Puffy or Dutch Baby or German pancake–whatever you call it, that’s my favorite Christmas-morning food. But the clafoutis is sweeter and has fruit inside. If you have 3 cups of fruit and some kitchen basics like milk and eggs and flour, you can make this dessert very last-minute, even just as you sit down to eat the main course, another selling factor. Easy, yet quite impressive.Though clafoutis is traditionally made with cherries, as it was in the recipe Martha shared in her must-have 1995 cookbook, “The Martha Stewart Cookbook: Collected Recipes for Every Day” (affiliate link), I’ve come to regard her batter as the universal solvent for all things fruit.With it, I have since made clafoutis from peaches, plums, pears, various berries, cherries, and mixes of fresh fruit and dried (such as by adding a handful of dried cranberries or cherries to pears

Can ZZ Plant Cause Cancer? If you too have this question lurking in your mind, then we have all the right answers for you!

At Tidy Mom, the blogger Jessica shares how she made a wooden outdoor planter on wheels. You can also use it as an indoor planter. Some woodworking and painting are required. But, overall, it’s not that difficult.

If you are bored of growing your green friends in pots and want a different way to showcase them, then you can try Plants on Lava Rock. Sounds weird? It’s not! Read ahead!

Have you ever visited a botanical garden on a warm spring day and marveled at tulips in a rainbow of colors, with shapes ranging from cups to stars, contrasting striations, and ruffled edges?Now’s your chance to bring a taste of that awes

Tulips are popular around the World, often known as the soul of Spring, and historically symbolic for perfect love. Finding the perfect Tulip for your location can often be challenging, particularly as many of Tulip cultivar’s are fussy and short-lived.