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What to Plant in March: A Natura Grow Guide to Starting the Season Strong
March marks the true beginning of the gardening year in the UK. As daylight increases and soil slowly warms, gardeners finally get the green light to start sowing and planting in earnest. While the weather can still swing from frosty mornings to mild afternoons, there is a wide selection of hardy vegetables, tender crops, flowers, fruits, and shrubs that can be planted right now for a thriving season ahead.
To help your crops establish even better, this guide also highlights where Natura Grow Liquid Organic Fertiliser and Natura Grow Soil Improver naturally enhance growth, soil structure, and biological activity—giving your garden a healthier, more sustainable start to the year.
🥕 Hardy Vegetables to Sow Outdoors
Early spring is perfect for sowing hardy vegetables directly into the ground. These crops enjoy cool soil and are reliable performers.
Broad Beans
Broad beans germinate well in cool soil and can be sown directly outdoors in March. Once rooted, they benefit from a nutrient-rich but natural environment. Applying Natura Grow Soil Improver boosts organic matter and supports early root development.
Peas
Peas thrive when sown outdoors this month. They grow strongly in cool temperatures and establish quickly. Lightly feeding the soil beforehand with Natura Grow Liquid promotes vigorous early growth without the harshness of synthetic fertilisers.
Parsnips
A long-season crop, parsnips prefer the cool soil of early spring for germination. They particularly benefit from well-structured soil—something Natura Grow Soil Improver helps enhance by increasing moisture retention and natural aeration.
Spinach & Lettuce
These leafy crops thrive in March’s gentle temperatures. Regular light feeds with Natura Grow Liquid help maintain fast, leafy production throughout the season.
🥔 Early Potatoes
First early potatoes can be planted this month—mid-March in the south and late March in the north. They form stronger root systems when planted into nutrient-rich, biologically active soil, making Natura Grow Soil Improver ideal for preparing potato beds.
🌿 Vegetables to Start Indoors
Tender vegetables need warmth to germinate, so March is the perfect month to sow them indoors.
Tomatoes
Tomatoes germinate best at 18–21°C and benefit from 6–8 weeks indoors before planting out. Once they move outside, feeding with Natura Grow Liquid supports flowering and fruit development naturally.
Peppers & Chillies
These crops need warmth and a long growing season, making March sowings essential. As they are heavy feeders later in the season, a switch to Natura Grow Liquid during growth boosts strength and yield.
Aubergines
Requiring 21–25°C to germinate, aubergines appreciate warm indoor conditions. They thrive in soil enriched with organic material, making the soil improver ideal during transplanting.
Courgettes
Sow courgettes indoors toward the end of March. They love rich soil, and adding Natura Grow products at planting helps produce strong, fruit-heavy plants.
Basil
Basil germinates well indoors and enjoys warm, bright windowsills. A light feed with Natura Grow helps produce fragrant, healthy foliage.
🌼 Flowers to Sow or Plant in March
Hardy Annuals
Calendula and cornflowers can be sown directly outdoors this month. They grow especially well in naturally enriched soil where microbial activity is high—exactly the environment supported by Natura Grow Soil Improver.
Dahlias
Start dahlia tubers indoors in pots this month. Once planted outside, a feed with Natura Grow encourages lush blooms.
Gladioli
Gladioli corms can be planted in pots or outdoors in milder areas. Well-fed soil ensures tall, vibrant spikes later in summer.
Hardy Perennials
March is excellent for planting hardy perennials such as geraniums, astrantia, and geums. They establish more deeply in organically enriched soil, which Natura Grow helps maintain.
🍓 Fruit to Plant in March
Bare‑Root Fruit Trees & Canes
March is the final chance to plant bare-root fruit trees and canes. They root rapidly when planted into well-conditioned soil, and Natura Grow enhances that rooting environment naturally.
Strawberries
Strawberries planted now settle quickly and produce early summer fruit. They benefit from regular light feeding with Natura Grow to support steady, sweet berry formation.