Cucumbers and crops growing in a greenhouse

How to Grow Cucumbers in a Greenhouse: The UK Season, Start to Finish

Waldenhaus
An April sowing, one string and a steady watering can. The full UK method for greenhouse cucumbers, from all-female F1 varieties to the last fruit in October.

Spint in de kas bestrijden: herkennen, voorkomen en biologisch aanpakken

Waldenhaus
Tagged: Growing NL
Bijgewerkt juli 2026 · leestijd ~8 min · door Waldenhaus Kort antwoord: spint gedijt in een warme, droge kas — precies de omstandigheden bij de deur en de ramen op...
Spring seed trays and young seedlings on timber staging inside a British greenhouse

What to Grow in a Greenhouse in Spring: A UK Sowing Calendar

Waldenhaus
The question of what to grow in a greenhouse in spring has a misleading answer on most of the web: a tidy list of crops pinned to month names. The...
A tomato truss in an autumn greenhouse ripening through green, orange and red on one stem

Ripening End-of-Season Tomatoes: Get Six More Weeks

Waldenhaus Team
By late August the calendar makes the call for you. The trusses near the top are still small and green, the light is dropping by a few minutes each evening,...
Trays of young winter salad leaves on a timber bench in an unheated greenhouse, condensation on the panels

Winter Salads: Sow in August, Pick Until March

Waldenhaus Team
If you want salad leaves on the plate in January, the work happens in August. Sow your hardy leaves in August and September, while there is still light and warmth...
A greenhouse cucumber plant with a white powdery-mildew film dusting the upper leaf surfaces

Powdery Mildew on Greenhouse Cucumbers: Stop the Spread

Waldenhaus Team
White powder on cucumber and courgette leaves looks like someone dusted them with flour, and the first instinct is usually to blame damp. That instinct gets powdery mildew on cucumbers...
Whiteflies on the underside of a greenhouse tomato leaf with a yellow sticky trap behind

Whitefly Under Glass: How to Actually Clear It

Waldenhaus Team
Reach for the spray can and you will lose this fight. Greenhouse whitefly survive contact insecticides because two of their life stages, the egg and the non-feeding pupa, shrug them...
Close-up of a leaf with fine pale stippling and silk webbing along the edge, the sign of red spider mite

Red Spider Mite in the Greenhouse: Spot It and Stop It

Waldenhaus Team
Most greenhouse trouble in a heatwave gets blamed on the watering can, so the fix feels obvious: hold off, dry things out, let the air move. Red spider mite turns...
A greenhouse tomato plant on a cane support with a ripening truss and some lower-leaf stress

What's Wrong With My Tomato Plant? A Photo Diagnostic

Waldenhaus Team
When a tomato plant tells you something is wrong, it almost always names the cause itself. Curled leaves, a black sunken base, a split skin, hard green shoulders: each marking...
A tomato truss in a greenhouse with open yellow flowers and a few tiny green fruit just set

Why Greenhouse Fruit Isn't Setting (Tomatoes, Cucumbers, Peppers)

Waldenhaus Team
You can grow tomatoes against the south glass, cucumbers up a string and peppers in a pot beside the door, and watch all three flower like mad in July, and...
Greenhouse cucumber plant with interveinal yellowing on a lower leaf, the veins still green, a fruit alongside

Why Cucumber Leaves Turn Yellow (and How to Fix It)

Waldenhaus Team
Look at where the yellow sits before you reach for the feed. Cucumber leaves turning yellow on the oldest growth near the base means one thing; yellow on the brand-new...
Greenhouse tomatoes and cucumbers in grow bags on a timber bench, fed by a drip line from a black water butt

Watering a Greenhouse While You're Away (UK Guide)

Waldenhaus Team
The gadget you buy matters far less than two boring things: how much water sits in the reservoir, and whether every pot keeps even contact with it. A £79 timer...