Skip to plant information
1 of 1

Penstemon hartwegii 'Giant Flowered'

Penstemon hartwegii 'Giant Flowered'


Regular price £9.00 GBP
Regular price Sale price £9.00 GBP
Sale Sold out
Tax included. Shipping calculated at checkout.
Approx rootball size

Available for dispatch from May

Sustainably Grown Organic Penstemon hartwegii 'Giant Flowered'

🌸 Add dramatic, vertical interest to your sunny borders with this larger-than-life beardtongue cultivar. This organic Penstemon hartwegii 'Giant Flowered' is an eye-catching perennial that rockets up stout spikes tipped with oversized, tubular blooms.

🔴 Supersized Blooms

As the name suggests, the crowning glory of 'Giant Flowered' is its profusion of big, lipstick-red flower clusters. From late spring into early summer, multiple sturdy stems soar upwards adorned with tiers of flared, tubular blooms up to 2 inches long.

Each rich scarlet, pink or purple blossom has distinctive creamy-white interior striping that amplifies the already intense, look-at-me color. The seemingly endless supply of flowers arrives in dense, foot-long panicles that add bold pops of sizzling colour to mixed plantings.

🌳 Stately Presence

More than just a colorful bloom, this showstopping Penstemon forms an upright, imposing clump of blue-green foliage at the base. Its thick, leathery leaves have a pleasantly minty fragrance when brushed against.

While modest in height at first, the rigid flowering stalks eventually reach a lofty 2 or 3 feet tall, making them ideal accents for the middle or back of borders. Their stout, vertical presence creates sound architectural interest and plays beautifully with softer surrounding textures.

🐝 Pollinator Candy

Those larger-than-life red blooms basically scream "Eat me!" to hummingbirds, butterflies, and other nectar-loving pollinators from miles away. Once they locate the sweet, sugary tubular flowers, the insects will be in paradise gorging themselves for weeks on end.

🎇 Fiery Combinations

  • Scorching Heat: Amplify the sizzle by partnering with other blazing orange and yellow-toned perennials like Kniphofia or Gaillardia.
  • Cooling Contrast: Juxtapose those smoldering reds and hot pinks against contrasting purples like Salvia or blues like sea holly for saturated drama.
  • Pastel Pops: Add refreshing pops of color to soft apricot, pink and lavender plantings for a more subdued scheme.
  • Rustic Meadow: 'Giant Flowered' mingles nicely with ornamental grasses, yarrows, and other prairie-style plants.

☀️ Growing Tips

This bold, drought-resistant Penstemon is a cinch to grow in hot, sunny locations with sharply-drained soil. It naturally occurs across the southwestern US, so it laughs at summer's scorching heat.

Water moderately the first season to establish, then plants will coast through even extended dry periods once their deep taproots take hold. A winter mulch provides protection in colder areas.

After flowering finishes, prune off spent spikes to refresh plants and encourage repeat blooms later in the year. Otherwise, just sit back and enjoy this low-care, long-blooming perennial dynamo!

With its statuesque, densely-flowered spires in bold shades of lipstick red, Penstemon 'Giant Flowered' brings sizzling vertical color to hot, sunny gardens and borders. This larger-than-life beauty is also a butterfly and hummingbird magnet!

Plant care guide

How do you plant perennials?

Dig a hole slightly larger than the woodfibre pot or balled rootball size, but no deeper. If it is a plant that likes to stay on the drier side (such as lavender), make the hole slightly shallower than the root ball so the surface of the rootball sits proud of the ground and use organic matter around the plant to stop water pooling on the base of the plant.

Water the hole and if the woodfibre pot or rootball doesn't seem moist pre-soak the pot or hessian contained rootball until it is saturated (no more bubbles rise to the surface).

There is normally no need to add compost to the hole if you have an established garden with healthy plants already growing. If you have a newbuild property or poor growth to existing plans chances are that your whole flowerbed needs improving with organic matter.

Place the pot or rootball in the hole. You can remove the hessian sacking it came in, or just remove the staple/twine and open the top once it's in the ground so the plant is free. The roots will easily grow through and the hessian will decompose, as will the woodfibre pots. Back fill the surrounding area with the dug soil. Do not firm the soil down hard! Roots need air and water and hard compacted soil prevents them from getting both.

Once planted water the plant in well and then water again whenever the soil starts to dry out under the surface, being careful not to overwater.

Mulching with something like woodchips around the plant after watering will help the soil to retain the moisture in hot weather. The perennial's foliage will die off in the winter and the plant will regrow through the mulch in the spring!

When to plant perennials in the UK?

Perennial plants can be planted out in the garden or in pots from spring, through the summer, to autumn. During dry weather and especially during the summer much closer attention needs to be given to watering in the first year.

If planting in hot weather, cut the foliage and flowers back. Your new plant will not be taking up much water until established so may struggle if the leaves lose more water than the roots can absorb. For the strongest result do not allow to flower or at least to set seed in the first year.

Where to plant perennials?

Check the plant info at the bottom of the page for the best place to position your new plant. If it prefers sun and you plant it in a north facing flowerbed next to a wall don't expect it to thrive or flower.

Pay attention to the soil. if it is heavy clay, incorporate organic matter such as compost to the soil before planting your perennial, preferably to the whole flowerbed. This will improve the soil by buffering it's water and nutrient holding ability. It is preferable to not just plonk compost in the bottom of the hole as it will not improve the overall condition of the soil surrounding your new plant. Do not add a layer of gravel or grit to the bottom of the hole as this will merely cause the perched water table to be higher. It will not improve drainage.

How do you care for perennial plants?

Cut back untidy foliage in the spring (you can leave the clippings on the flower bed to allow the nutrients to recycle into the soil). Divide every 3 to 5 years as the centre dies out and replant your extra plants! Perennials come back every year. Some are longer living than others.

Should perennials be fertilised?

The vast majority of garden soils contain plenty of nutrients, but if your garden is in a newly built development there is a good chance a thin layer of topsoil has been added on top of infertile subsoil. if that is the case, compost, soil improver or well rotted manure can be spread on the flower bed and dug in, or alternatively for those short of time or energy, organic fertiliser such as our own special organic mix of bone meal, hoof and horn and vinaase that is an organic, sustainable alternative to the John Innes formula, can be sprinkled around the plant with some compost added to the planting hole.

Delivery £5 flat rate or FREE over £50 spend.

I charge a flat rate of £5 for postage and packaging to all of Britain, including the Highlands and the Isle of Man, with free delivery for orders over £50. We are unable to send plants to Northern Ireland.

I use Royal Mail for our deliveries as they have the lowest carbon footprint per parcel delivered in the UK and actually tend to look after parcels rather than just chucking them over the nearest fence! This ensures that your plants will have the best care possible.

Please have a Safe Place set up if possible so your plants are not returned to the sorting office if no one is home to accept the delivery.

I try to dispatch plants twice a week and you will receive updates by text or email. In cases of extreme weather or if Royal Mail has a hiccup the delivery may be delayed but we'll keep you in the loop.

I'm unable to deliver to the Channel Islands or Northern Ireland.

The LAWNMOWER Guarantee

Healthy plants & happy customers

Your plant will only be dispatched if I'm happy it is healthy. The nature of growing the plants in large troughs means that the root system will be trimmed before they are balled in hessian, and therefore, depending on the time of year, the top growth may also be trimmed to make sure the roots are able to supply the water and nutrients your new plant requires.

Pruning encourages new growth and this applies to roots as well so a pruned plant actually results in a stronger plant.

The LAWNMOWER guarantee.

If you're not happy with your plants for any reason, even if you've run them over with your lawnmower, just pop them in a box (the plants, not the mower!) and post them back to us within 1 year for a replacement or refund.

This does not affect your statutory rights.

For full details check out the Refunds and Returns Policy.


Eco-friendly business

Fed up with plants grown in plastic pots which are doused in herbicides and sprayed with synthetic chemicals by big nurseries who merrily burn through finite resources, fly plants in from abroad on jet planes, irresponsibly use peat and coir, kill any insect nearby with non-selective pesticides and generally only think of the bottom line?

So are we!

How we grow plants sustainably

Our plants are started in coldframes or inside our house, grown-on woodfibre pots or in reclaimed wooden troughs which are then carefully harvested and balled and burlapped (hessian wrap securing the rootball), before packing plastic free in a eco cardboard box from a certified B-corp carbon neutral supplier. Some plants are grown in 8cm woodfibre pots.

Sustainable and organic compost & fertiliser

Our Soil Association certified organic compost is bought in bulk without plastic bags from Dalefoot Compost, and consists of sheep wool, bracken and comfrey. This naturally feeds the plants for 12 months. If supplemental feeding is required we only use our own special blend of organic fertilisers (bone meal, hoof & horn and vinaase) which have been processed with solar energy.

Carbon Neutral business

The small amount of electricity we use is from renewable sources and we irrigate our plants with stored water we have harvested. Plus, we are using our house and land for more than one purpose, preventing further land use and utilising the sunk carbon cost of the building rather than creating more.

We have partnered with Carbon Neutral Britain to offset our emissions, and recognise that we are not in control of all parts of the supply chain so have fully offset scopes 1, 2 and 3 to take that in to account - so that's all emissions connected to our business, from the farts coming out of the back of the sheep, to the carbon dioxide from the delivery van outside your door.

We don't just offset and carry on, ALL the decisions we make work to reduce emissions - for instance we use Royal Mail to post our plants as they have by far the lowest carbon footprint per parcel delivered in the UK.

Penstemon hartwegii 'Giant Flowered'

View full details
Full Sun
Broad PH tolerance
Well drained
H 0.75 m X W 0.4 m
Spring, Summer, Autumn, and Winter
Pollinator friendly

Customer Reviews

Be the first to write a review