Get Set, Grow! Episode Twelve

Clear your crops and sow another, see ways to prevent powdery mildew, harvest sweetcorn, prep the plot for winter and plan for next spring

In the twelfth episode of Get, Set, Grow! Lettie demonstrates how to clear crops that are ready for harvesting allowing space to sow new winter crops, and shares how to sow radishes, which are quick and easy to grow. How about trying some winter varieties to spice up your salad in the colder months? It’s also time to gather your sweetcorn, and there are simple steps to follow that indicate when the crop is ripe for harvesting.

Also in this episode, there are tips to identify and try to treat powdery mildew, which can attack a wide range of plants. Lettie offers advice on getting your plot ready for winter with regular weeding or successional sowing, shows how adding a layer of mulch for the autumn can suppress weeds and lock moisture in the soil and encourages you to start planning the plot for next spring.

What you’ll need for Episode Twelve

We’ve made a list of all the gardening tools, plants and seeds Lettie is using in the twelfth episode of Get Set, Grow!

We’ve included links to the RHS Shop so you can take a closer look or order anything you need, if you like. You may have some of these items already. Remember, you don’t need to buy everything and you might be able to borrow some tools.

Essential tools

Crops for clearing/harvesting

  • Beetroot
  • Carrots
  • Sweetcorn

​Seeds for sowing

In case you missed it...

Episode One

Plant strawberries and chit potatoes

Prepare your growing space, and plant your first crop – strawberries! Learn how to chit potatoes ready for planting in the coming weeks.

Episode Two

Plant potatoes, onions and garlic

Find out about crop rotation and why it's important for your plot. Plant your chitted potatoes, alongside onion bulbs and garlic sets.

Episode Three

Sow seeds outdoors and protect crops

You'll be guided through sowing seeds directly into your soil, separating seedlings, weeding, and staking and protecting your crops.

Episode Four

Thin out and harden off seedlings

Find out what thinning out and hardening off mean. Plus, create a wigwam to support plants such as runner beans, and sow larger seeds indoors.

Episode Five

Plant out tender vegetables

Find out how to plant out tender vegetables, plus learn about successional sowing and protecting and feeding strawberry plants.

Episode Six

An update on the plot

Take a look around the plot with Lettie and see how things are growing. Plus get some handy tips on watering and feeding plants.

Episode Seven

Protecting your crops

Harvest cut-and-come-again lettuce and get some useful tips on preventing pests and diseases from damaging your crops.

Episode Eight

Harvesting potatoes

Harvest your first early potatoes, get a reminder on weeding and find out how things are growing on the Get Set, Grow! plot.

Episode Nine

Continue harvesting your crop

Discover our tips for harvesting crops like courgettes, chard, peas and broccoli. Plus, find out how to reduce powdery mildew.

Episode Ten

Harvesting and sowing crops

Check that your onions and garlic are ready for harvesting, learn how to transplant young leeks and get tips for sowing tasty greens and carrots.

Episode Eleven

Checking in on your plot

Take a tour of the plot to see how the crops are doing, find out what’s ready for harvesting, what to sow and what can now be removed.

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The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.